Heady, Earl O., author
Agricultural production functions
Iowa State University Press, 1969
 Buku Teks
Muhammad Ashraf, editor
Crop production for agricultural improvement
[, Springer], 2012
 eBooks
Heatfield, David F.
Production functions / David F. Heathfield
Macmillan, 1971
 Buku Teks
Heady, Earl O., author
Economics of agricultural production and resource use
Prentice-Hall, 1952
 Buku Teks
Abrol, Dharam P., author
Pollination biology: biodiversity conservation and agricultural production
[, Springer], 2012
 eBooks
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