00943cam a22002651  4500001001300000003000400013005001700017008004100034010001700075035002000092040002500112050002200137100003700159245013400196246003800330260004900368300003300417490006000450500002800510650002400538650003300562700003800595830002700633999001700660agr42000134 DLC20260227111000.0950816s1941    dcua          000 0 eng    aagr42000134   a(OCoLC)34642808  aDLCcNNCdOCoLCdDLC00aS623b.U44 no. 221 aMortlock, Harry Crawford,d1892-10aErosion and related land use conditions on the Box elder creek project, Nebraska,cby H. C. Mortlock ... and R. D. Greenawalt ...30aBox elder creek project, Nebraska  a[Washington,bU.S. Govt. print. off.,c1941]  a34 p.billus., maps.c26 cm.1 aU. S. Soil conservation service. Erosion surveyvno. 22  a7 fold. maps in pocket. 0aLand usezNebraska. 0aSoil conservationzNebraska.1 aGreenawalt, Ross Dilworth,d1906- 0aErosion surveyvno. 22  c10180d10180