00558nam a2200181 a 450000500170000000800410001702000180005804100080007608200080008410000420009224500660013426400300020030000330023049000370026365000230030065000270032370000260035020260717091033.0260717s1971    ii            000 0 eng d  a9780050023228  aeng04a5761 aGray, T. R. G. (Timothy R. G.), 1937-10aSoil micro-organisms /cGray, T. R. G. (Timothy R. G.), 1937- 1aLondon :bLongman,c1971.  aviii, 240 p. : ill. ; 22 cm.0 aUniversity reviews in botany, 2. 4aSoil microbiology. 4aSols -- Microbiologie.1 aWilliams, S. T. 1937-