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003 DLC
005 20260227111312.0
008 790702s1911 dcuf f001 0 eng
010 _ags 11000616
035 _a(OCoLC)5130375
040 _aDLC
_cICharE
_dDLC
042 _apremarc
043 _an-us-il
045 _ax0x1
050 0 0 _aQE75
_b.B9 no. 493
100 1 _aMarshall, R. B.
_q(Robert Bradford),
_d1867-1949.
245 1 0 _aResults of spirit leveling in Illinois, 1909 and 1910 /
_cR.B. Marshall, chief geographer. Work done in cooperation with the state of Illinois.
260 _aWashington,
_bGovt. Print. Off.,
_c1911.
300 _a115 p. :
_bpl. ;
_c24 cm.
490 1 _aU.S. Geological survey. Bulletin 493
500 _aIncludes index.
651 0 _aIllinois
_xAltitudes.
710 2 _aIllinois State Geological Survey
810 1 _aUnited States.
_bGeological Survey.
_tBulletin ;
_v493.
999 _c25096
_d25096