00796cam a22002531a 4500 gs 66000294 DLC 20260227111420.0 811016s1966 dcu b f000 0 eng c gs 66000294 (OCoLC)7851546 U.S. Geol. Survey. Libr. FJAE FJAE OCoLC DLC premarc QE75 .C5 no. 527 551.4/9/0973 Hackett, O. M. (Orwoll Milton), 1920- Ground-water research in the United States / by O. M. Hackett. Washington : U.S. Govt. Print. Off., 1966. 8 p. ; 27 cm. Geological Survey circular ; 527 Bibliography: p. 7-8. Water-supply United States. Groundwater United States. 30266 30266