Results of spirit leveling in Iowa 1896 to 1909, inclusive. /
Marshall, R. B. 1867-1949.
Results of spirit leveling in Iowa 1896 to 1909, inclusive. / R.B. Marshall chief geographer. Work done in cooperation with the state of Iowa from 1907 to 1909, inclusive. - Washington, Govt. Print. Off., 1911. - 32 p. pl. ; 24 cm. - U.S. Geological survey. Bulletin 460 . - United States. Geological Survey. Bulletin ; 460. .
Issued also as House doc. no. 1433, 61st Cong., 3d sess. Includes index.
gs 11000328
Iowa--Altitudes.
QE75 / .B9 no. 460
Results of spirit leveling in Iowa 1896 to 1909, inclusive. / R.B. Marshall chief geographer. Work done in cooperation with the state of Iowa from 1907 to 1909, inclusive. - Washington, Govt. Print. Off., 1911. - 32 p. pl. ; 24 cm. - U.S. Geological survey. Bulletin 460 . - United States. Geological Survey. Bulletin ; 460. .
Issued also as House doc. no. 1433, 61st Cong., 3d sess. Includes index.
gs 11000328
Iowa--Altitudes.
QE75 / .B9 no. 460