TY  - BOOK
AU  - Marshall,R.B.
TI  - Results of spirit leveling in Iowa 1896 to 1909, inclusive.
T2  - U.S. Geological survey. Bulletin 460
AV  - QE75 .B9 no. 460
PY  - 1911///
CY  - Washington
PB  - Govt. Print. Off.
KW  - Iowa
KW  - Altitudes
N1  - Issued also as House doc. no. 1433, 61st Cong., 3d sess; Includes index
ER  -