ID:DA00583598
Nigeria. Agricultural Research Council
ARCN
A.R.C.N
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edited by D.J. Greenland and R. Lal
Wiley c1977 A Wiley-Interscience publication
Available at 18 libraries
edited by D. H. Lloyd and K. C. Sellers
Academic Press 1976
Available at 4 libraries
Food and Agriculture Organization of the United Nations 1974 Soils bulletin 24
Available at 3 libraries