000 00307nam a2200133Ia 4500
008 160316s1988 xxu||||| |||| 00| 0 eng d
020 _a
100 _aBhatnagar,S
245 _aEducation And Community Technology
250 _a
260 _aNEW DELHI
_bESS PUBLICATION
_c1988
300 _a298
700 _a
_a
999 _c4175
_d4175