Introduction to agricultural systems
Spedding, C R W
Introduction to agricultural systems - London Applied science publishers ltd. 1979 - ix,169p.; 22cm.
853348235
Agriculture
Animal production
Biological efficiency
Crop production
Introduction to agricultural systems - London Applied science publishers ltd. 1979 - ix,169p.; 22cm.
853348235
Agriculture
Animal production
Biological efficiency
Crop production