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 Sanskrit word vastu means a dwelling or house with a corresponding plot of land. The vrddhi, vÄstu, takes the meaning of the site or foundation of a house, site, ground, building or dwelling-place, habitation, homestead, house. The underlying root is vas to dwell, live, stay, reside. The term shastra may loosely be translated as doctrine, teaching. Vastu-Sastras (literally, science of dwelling) are ancient Sanskrit manuals of architecture.