Yazar
a d r ker
3 cilt bulundu.
Cilt sonuçları
Food or famine
A. D. R. Ker · International Development Research Centre
79 sayfa · 1979
Agricultural estimating and reporting / Crop yields
Intercropping in semi-arid areas
A. D. R. Ker, Marilyn Campbell · International Development Research Centre
72 sayfa · 1976
Intercropping / Congresses / Arid regions agriculture / Arid regions / Crop yields