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020 _a92-3-102304-
040 _aJPS
090 0 0 _aUNESCO 551.49 UNE
110 _aUNESCO.
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245 0 _aTEACHING AIDS IN HYDROLOGY
260 _aPARIS: UNESCO,
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300 _a76P; MAPS
440 _aTECHNICAL PAPERS IN HYDROLOGY NO. 27
546 _aENG
650 1 0 _aHydrology.
942 _cMONO
990 _a1985
999 _a05514
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003 JPS