@book{33034,
	author = {Subba Rao, N. S. (Nanjappa Shamanna), 1926-},
	title = {Biofertilizers in agriculture and forestry /},
	publisher = {Oxford & IBH Pub. Co.,,},
	year = {1993.},
	address = {New Delhi :},
	edition = {3rd ed.}
}