00538nam a22002057a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093082001600102110005500118245005500173260004200228300002800270500001000298650001200308650001200320CHAP20220329141445.0971013s1983    iaua    r     00010 eng d  a68461  a69433  a78909  cCHAP04a551.573bS62 aSoil Conservation Society of America. Ankeny, Iowa10aAcid precipitation :bThe North American Challenge  aAnkeny, Iowa :bThe Society,c[1983?]  a[c.a. 150] p.bgráfs.  a29-9814aAcidez.14aLluvia.