Question:
Who was the head of Romania in Jun, 1961?

Context:
 Octavian Goga is the head of the government of Romania from Dec, 1937 to Feb, 1938. 
 Take Ionescu is the head of the government of Romania from Dec, 1921 to Jan, 1922. 
 Ilie Verdeț is the head of the government of Romania from Mar, 1979 to May, 1982. 
 Ion C. Brătianu is the head of the government of Romania from Jun, 1881 to Mar, 1888. 
 Mihail Kogălniceanu is the head of the government of Romania from Oct, 1863 to Jan, 1865. 
 Adrian Năstase is the head of the government of Romania from Dec, 2000 to Dec, 2004. 
 Gheorghe Tătărescu is the head of the government of Romania from Jan, 1934 to Dec, 1937. 
 Ștefan Golescu is the head of the government of Romania from Nov, 1867 to May, 1868. 
 Călin Popescu-Tăriceanu is the head of the government of Romania from Dec, 2004 to Dec, 2008. 
 Dimitrie Sturdza is the head of the government of Romania from Apr, 1897 to Apr, 1899. 
 Nicolae Rădescu is the head of the government of Romania from Dec, 1944 to Feb, 1945. 
 Miron Cristea is the head of the government of Romania from Feb, 1938 to Mar, 1939. 
 Sorin Grindeanu is the head of the government of Romania from Jan, 2017 to Jun, 2017. 
 Mihai Răzvan Ungureanu is the head of the government of Romania from Feb, 2012 to May, 2012. 
 Viorica Dăncilă is the head of the government of Romania from Jan, 2018 to Nov, 2019. 
 Manolache Costache Epureanu is the head of the government of Romania from May, 1876 to Aug, 1876. 
 Ion Gigurtu is the head of the government of Romania from Jul, 1940 to Sep, 1940. 
 Gheorghe Gheorghiu-Dej is the head of the government of Romania from Jun, 1952 to Oct, 1955. 
 Ludovic Orban is the head of the government of Romania from Nov, 2019 to Dec, 2020. 
 Ion Ghica is the head of the government of Romania from Dec, 1870 to Mar, 1871. 
 Lascăr Catargi is the head of the government of Romania from Dec, 1891 to Oct, 1895. 
 Nicolae Iorga is the head of the government of Romania from Apr, 1931 to Jun, 1932. 
 Mugur Isărescu is the head of the government of Romania from Dec, 1999 to Dec, 2000. 
 Radu Vasile is the head of the government of Romania from Apr, 1998 to Dec, 1999. 
 Mihai Tudose is the head of the government of Romania from Jun, 2017 to Jan, 2018. 
 Armand Călinescu is the head of the government of Romania from Mar, 1939 to Sep, 1939. 
 Theodor Stolojan is the head of the government of Romania from Oct, 1991 to Nov, 1992. 
 Nicolae Văcăroiu is the head of the government of Romania from Nov, 1992 to Dec, 1996. 
 Nicolae Crețulescu is the head of the government of Romania from Jun, 1865 to Feb, 1866. 
 Victor Ponta is the head of the government of Romania from May, 2012 to Nov, 2015. 
 Theodor Rosetti is the head of the government of Romania from Mar, 1888 to Mar, 1889. 
 Emil Boc is the head of the government of Romania from Dec, 2008 to Feb, 2012. 
 Petru Groza is the head of the government of Romania from Mar, 1945 to Jun, 1952. 
 Nicolae Golescu is the head of the government of Romania from May, 1868 to Nov, 1868. 
 Victor Ciorbea is the head of the government of Romania from Dec, 1996 to Apr, 1998. 
 Barbu Catargiu is the head of the government of Romania from Feb, 1862 to Jun, 1862. 
 Petre S. Aurelian is the head of the government of Romania from Dec, 1896 to Apr, 1897. 
 Ion Emanuel Florescu is the head of the government of Romania from Mar, 1891 to Dec, 1891. 
 Constantin Argetoianu is the head of the government of Romania from Sep, 1939 to Nov, 1939. 
 Nicolae Ciucă is the head of the government of Romania from Nov, 2021 to Dec, 2022. 
 Dimitrie Brătianu is the head of the government of Romania from Apr, 1881 to Jun, 1881. 
 Manea Mănescu is the head of the government of Romania from Feb, 1974 to Mar, 1979. 
 Constantin Bosianu is the head of the government of Romania from Jan, 1865 to Jun, 1865. 
 Chivu Stoica is the head of the government of Romania from Oct, 1955 to Mar, 1961. 
 Gheorghe Argeșanu is the head of the government of Romania from Sep, 1939 to Sep, 1939. 
 Alexandru G. Golescu is the head of the government of Romania from Feb, 1870 to Apr, 1870. 
 Dacian Cioloș is the head of the government of Romania from Nov, 2015 to Jan, 2017. 
 Petre Roman is the head of the government of Romania from Dec, 1989 to Oct, 1991. 
 Ion Gheorghe Maurer is the head of the government of Romania from Mar, 1961 to Feb, 1974. 
 Florin Cîțu is the head of the government of Romania from Dec, 2020 to Nov, 2021. 
 Dimitrie Ghica is the head of the government of Romania from Nov, 1868 to Jan, 1870. 
 Constantin Sănătescu is the head of the government of Romania from Aug, 1944 to Dec, 1944. 
 Constantin Dăscălescu is the head of the government of Romania from May, 1982 to Dec, 1989. 
 Ion G. Duca is the head of the government of Romania from Nov, 1933 to Dec, 1933.

Answer:
Ion Gheorghe Maurer