01164cas a22003617ar450000500170000000800410001701000100005801100100006802200140007803500110009224500680010326000560017130000070022731000140023432100120024836200170026059000410027759000410031859000410035959000420040065000600044265000640050278000220056686600340058886600270062286600200064986600300066986600270069986600190072690100070074590500330075299900170078520220329143037.0001017u1981    us mr p rnn   0   b1eng d  a91118  a92090  a0199-9060  a10265300aSoil and Water Conservation Newsc/by Soil Conservation Service0 aWashington, D.C.:bSoil Conservation Servicec1980.  av.  aBimestral  aMensual  av.13n.2,1992  aBATCH-UPDb10c20130110lUCH01h0453  aBATCH-UPDb10c20130410lUCH01h0130  aBATCH-UPDb10c20130913lUCH01h2240  aCONVERSIONb10c20130109lUCH01h135014aAguaxConservaciónxPublicaciones periódicas.9233514aSuelosxConservaciónxPublicaciones periódicas.9110312  tSoil conservation  av.1 n.1,3-9,11-12 (1980-1981)  av.12 n.3-7 (1991-1992)  av.13 n.2 (1993)  av.2 n.5-6,8-12 (981-1982)  av.3 n.7-12 (1982-1983)  av.4 n.2 (1983)  aSE  aAraceli Hernández Gómez.  c91118d91118