00384nam a2200109Ia 4500008004100000082002200041100001700063245005900080260004200139300001300181650008000194140224s9999    xx            000 0 und d  a371.335+374:63 K8  aRamkrishnan.  aAgricultural demonstration and extension communication  aBombaybAsia Publishing Housecc 1965  axv,260p.  aAgricultural extension work-study and teaching,Communication in agriculture