000 00338nam a22001337a 4500
082 _a621.31213
_bGER
_cL-30, P-9
100 _aGerard Geoffrey
245 _aHydro-electric engineering
_cGerard Geoffrey
250 _a1st ed.
260 _aLondon
_bSir Isaac Pitman
_c1949
300 _aix, 181 p.
_bill.
_c19 cm.
650 _aMCE
942 _cBK
999 _c5653
_d5653