Yazar
thomas a ruehr
2 cilt bulundu.
Cilt sonuçları
Fertigation
Charles M. Burt, Kris O'Connor, Thomas A. Ruehr · Irrigation Training & Research Center
320 sayfa · 1995
Agriculture - General / Technology & Industrial Arts
Agricultural ethics
Kathryn Paxton George, Peter G. Hartel, Horace D. Skipper, Thomas A. Ruehr · Wiley & Sons, Limited, John
70 sayfa · 1994
Agriculture / Congresses / Moral and ethical aspects / Business Ethics / Agriculture (General)