000 00291nam a2200109Ia 4500
008 151015s9999 xx 000 0 und d
245 _aFarm water management seminar Manila
260 _c1972
300 _aviii 342p.
500 _aFAO irrigation and drainage paper no- 42
942 _cFAO
_2udc
999 _c24366
_d24366