TY  - BOOK
AU  - Marshall,R.B.
TI  - Results of spirit leveling in Delaware, District of Columbia, Maryland, and Virginia, 1896 to 1909, inclusive
T2  - U.S. Geological survey. Bulletin
AV  - QE75 .B9 no. 434
PY  - 1910///
CY  - Washington
PB  - Govt. Print. Off.
KW  - Delaware
KW  - Altitudes
KW  - Washington (D.C.)
KW  - Maryland
KW  - Virginia
N1  - Issued also as House doc. no. 1015, 61st Cong., 3d sess; Includes index
ER  -