Handbuch des Speziellen GemusebauesVerlag Eugen Ulmer
Investigating production opportunities, marketing efficiency, and options of trade for fruits and veVerlage Ulrich E. Grauer
Pests of field cropsE. Arnold
Aphids on the World's Crops: An Identification GuideJohn Wiley and Sons
Breeding Field CropsAvi publishing company
Principles of field crop productionPearson Prentice Hall
Breeding field cropsBlackwell Pub.

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