00339nam a2200121Ia 4500008004100000082001600041100001700057245005700074260003100131300001300162600001600175650002600191140224s9999    xx            000 0 und d  a63.001.5 K4  aSalmon, S.C.  aThe principles and practice of agricultural research  aLondonbLeonard Hillc1964  axi,384p.  aS.C. Salmon  aAgricultural research