J. Sehgal Pedology concepts and applications - Ludhiana Kalayani Publishers 2002 - 488p J. Sehgal: Pedology concepts and applications. Ludhiana. Kalayani Publishers, 2002. 81-7663-764-5--(631.4SEH) ENGLISH ISBN: 81-7663-764-5 Dewey Class. No.: 631.4 / SEH