The Ecology of soil bacteria: an international symposium, edited by T. R. G. Gray and D. Parkinson. Gray, T. R. G. (Timothy R. G.), 1937- Parkinson, Donald, 1891- Soil microbial ecology Congresses. Bacteria Ecology Congresses. QR111 .E25 631.847 GRE Includes bibliographical references and index. Liverpool : University of Toronto Press, 1968. 1968. 1968 Text xv, 681 p. : eng