Harnetty, Peter
Crop trends in the central provinces of India 1861-1921
[T.t.] [T.p.] [T.th.]
 Buku Teks
Delorit, Richard J.
Crop production
Prentice-Hall, 1967
 Buku Teks
Trees as a farm crop / E. G. Richards ... [et al.]
Oxford BSP Professional Books 1988,
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Dietz, P. A.
Parapsychologische woordentolk / P. A. Dietz, K. H. E. Dejong, G. Zorab
H. P. Leopolds Uitgeversmij N.V., 1956
 Buku Teks
Crop science and food production
by Douglas D. Bishop ... [et al.]
McGraw-Hill, 1983
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