Change in ground water levels in North Dakota,
Simpson, Howard E. 1874-1938.
Change in ground water levels in North Dakota, by Howard E. Simpson; a report based upon data collected for the Mississippi Valley Committee, P. W. A., 1934. - Grand Forks, N. Dak., 1937. - 23 p. incl. illus. (maps) forms, tables. 23 cm.
"References": p. 3.
gs 38000084
Groundwater--North Dakota.
QE149 / .A23 no. 10
Change in ground water levels in North Dakota, by Howard E. Simpson; a report based upon data collected for the Mississippi Valley Committee, P. W. A., 1934. - Grand Forks, N. Dak., 1937. - 23 p. incl. illus. (maps) forms, tables. 23 cm.
"References": p. 3.
gs 38000084
Groundwater--North Dakota.
QE149 / .A23 no. 10