Ground-water research in the United States /
Hackett, O. M. 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.
gs 66000294
Water-supply--United States.
Groundwater--United States.
QE75 / .C5 no. 527
551.4/9/0973
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.
gs 66000294
Water-supply--United States.
Groundwater--United States.
QE75 / .C5 no. 527
551.4/9/0973