00664nam a22002177a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093100001600102245006100118260005600179300002200235490004300257650003300300650005100333650001900384830004300403CHAP20220817042721.0971013s1979            r     00010     d  a53286  a54258  a58409  cCHAP00aWebster, R.  aGrid sampling and computer mapping of the Ivybridge area  aHarpenden :bRothamsted Experimental Station,c1979  a64 p.b; gráfs.  aSoil survey. Technical monographv; 1214aLevantamiento topográfico.14aProcesamiento automático de datos en suelos.14aSuelosxMapas.0 aSoil survey. Technical monographv; 12