@book{28859,
	author = {Sehgal, Jawahar L.},
	title = {Introductory pedology: soil genesis, survey and classification/by Jawahar L. Sehgal},
	publisher = {Kalyani Publishers;},
	year = {2006.},
	address = {Ludhiana:},
	edition = {2nd. rev. & updated ed.}
}