Biological indicators of soil health / edited by C. Pankhurst, B.M. Doube and V.V.S.R. Gupta. Gupta, V. V. S. R. Pankhurst, C. (Clive) Doube, B. M. (Bernard M.) Soil biology. Indicators (Biology) QH84.8 .B54 1997 631.46 21 BIO Includes bibliographical references and index. Wallingford, UK ; New York : CAB International, c1997. c1997. 1997 Text xi, 451 p. : eng