000 00294nam a2200121Ia 4500
100 _aSingh, Uttam Kumar & Nayak, A. K.
020 _a81-7169-442-X
942 _cBK
245 _aExtension Education
260 _aCommonwealth, New Delhi
_c1997
082 _a370.194 Sin /Nay
300 _av, 204
999 _c31613
_d31613