00394nam a2200097Ia 4500008004100000040004400041245007700085260002000162300001000182500010400192180412s9999||||xx |||||||||||||| ||und||  aAhmadu Bello University Library - Zaria 0aBibliography on Copper in Soil, 1971-1969.cCOMMONWEALTH BUREAU OF SOILS  bHarpendenc1972  app.19  aBibliography on copper in soil, 1971-1969. (Annotated bibliography no. 1535) Harpenden, 1972. pp.19