00284nam a2200109 a 450000100080000000500110000800800410001910000180006024500540007826000330013265000090016517406162013-11-26       1940    bl uuuu      00u1 u    #d1 aCOMBER, N. M.  aIntroduction to the scientific study of the soil.  aLondres: Edward Arnoldc1940  aSolo