00951cam a22002651i 4500001001300000003000400013005001700017008004100034010001700075035001900092040002100111042001200132043001200144045000900156050002200165100005200187245017800239260004300417300002500460490004100485500006100526500002000587651002100607810005700628gs 11000328 DLC20260227111311.0790529s1911    dcuf         f001 0 eng    ags 11000328   a(OCoLC)5011771  aDLCcICharEdDLC  apremarc  an-us-ia  aw9x-00aQE75b.B9 no. 4601 aMarshall, R. B.q(Robert Bradford),d1867-1949.10aResults of spirit leveling in Iowa 1896 to 1909, inclusive. /cR.B. Marshall chief geographer.  Work done in cooperation with the state of Iowa from 1907 to 1909, inclusive.  aWashington,bGovt. Print. Off.,c1911.  a32 p.bpl. ;c24 cm.1 aU.S. Geological survey. Bulletin 460  aIssued also as House doc. no. 1433, 61st Cong., 3d sess.  aIncludes index. 0aIowaxAltitudes.1 aUnited States.bGeological Survey.tBulletin ;v460.