'In 1938 he developed a way to electronically measure the size of a radio show's audience'
Arthur Nielsen
FAMOUS AMERICANS: In 1938 he developed a way to electronically measure the size of a radio shows audience
In 1938 he developed a way to electronically measure the size of a radio show's audience
In 1938 he developed a way to electronically measure the size of a radio show's audience
FAMOUS AMERICANS
Arthur Nielsen
FAMOUS AMERICANS