000 00298 a2200133 4500
080 _a63(071.7)
_bP 963
245 1 _aAgricultural communications
_bProceedings
260 _aManila
_c1957
650 _aAgricultural
650 _aCommunications
100 _a
_d
300 _a157 p.
901 _a54974
999 _c41152
_d41152