000 nam a22 4500
082 _aRID.631.7
_bR6p
_d1977
100 _aRoyal Irrigation Department
245 _aPhitsanulok Irrigation Project : Water management in service units
_bReport no.20
260 _aBangkok
_bELC-NK-SEATEC
_c1977
942 _c12
999 _c2769
_d2769