In some academic disciplines the distinction between a secondary and tertiary source is relative, but in historiography it is absolute. In the UNISIST model, a secondary source is a bibliography, whereas a tertiary source is a synthesis of primary sources.
English Name for Vasambu is Sweet Flag. It is a semi-aquatic perennial herb whose scientific name is Acorus Calamus. In HIndi, it is called Bach. It is also called Bach in Bengali. would like to know the hindi/eng name for taml herb vasambu.
The word for air (vÄyu) or wind (pavana) is one of the classical elements in Hinduism. The Sanskrit word 'VÄta' literally means  blown , 'VÄyu'  blower , and PrÄna  breathing  (viz. the breath of life, cf. the *an-in ' animate ').ÊaËyu]) is a primary Hindu deity, the lord of the winds, the father of Bhima and the spiritual father of Hanuman. He is also known as VÄta, Pavana (the Purifier), and sometimes PrÄá¹a (the breath).