000 00284nam a22001217a 4500
020 _a8185421560
082 _a630.715
100 _aRay, G. L.
245 _aExtension Communication and Management
250 _a4 th Rvd.
260 _aCulcutta
_bNaya Prokash
_c2001
300 _a325 pp
999 _c88141
_d88141