Gray, T. R. G. (Timothy R. G.), 1937- Soil micro-organisms / Gray, T. R. G. (Timothy R. G.), 1937- - viii, 240 p. : ill. ; 22 cm. - University reviews in botany, 2. . ISBN: 9780050023228 Subjects--Topical Terms: Soil microbiology.Sols -- Microbiologie. Dewey Class. No.: 576