Balakrishnan Nair,N. (1989). Paristhithi vijnanam. Kerala Bhasha Institute.
Chicago Edition CitationBalakrishnan Nair,N. Paristhithi Vijnanam. Thiruvanathapuram: Kerala Bhasha Institute, 1989.
MLA Edition CitationBalakrishnan Nair,N. Paristhithi Vijnanam. Kerala Bhasha Institute, 1989.
Warning: These citations may not always be 100% accurate.