000 00299pam a2200121a 44500
008 140414b1977 xxu||||| |||| 00| 0 eng d
245 _aHydrological maps
_c
260 _aPARIS
_bUNESCO
_c1977
650 _a HYDROLOGICAL MAPS
650 _aHYDROLOGIC
690 _aHYDRAULIC ENGINEERING
906 _a7759
999 _c7444
_d7444