000			00562nam a22002057a 4500
015			_a4536
041			_a1
080			_a627.12 _bWIL
100			_aWilliams.G.P.
245			_aWASHINGTON, D.C.'S VANISHING SPRINGS AND WATERWAYS
260			_aUnited States Department of the Interior _bUSA _c1977
300			_a19p. _bILL.,Cht.,Fig and Table
490			_aGEOLOGICAL SURVEY CIRCULAR _v752
650			_a Engineering
852			_a 4R-1-3
999			_c3690 _d3690