Vincent, J. M. A manual for the practical study of the root nodule bacteria - London : International Biological Programme, 1970 - 164 p. : ilus. ; láms - IBP Handbook ; 15 . - IBP Handbook ; 15 . LCCN: 50654 Subjects--Topical Terms: Bacterias nitrificantes. Dewey Class. No.: 631.847 / V5