00726nam a22002177a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093082001500102100002900117245013600146260004900282300001000331490006900341650001800410650001100428830006900439CHAP20220329134640.0971013s1984            r     00010     d  a23586  a24558  a28657  cCHAP  a631.41bC400aChouldhry, Ghulam Ghaus.  aHumic substancesb: structural, photophysical, photochemical and free radical aspects and interactions with environmental chemicals  aNew York :bGordon and Breach Science,c1984  a185 p  aCurrent topics in environmental and toxicological chemistryv; 714aAcido humico.14aHumus.0 aCurrent topics in environmental and toxicological chemistryv; 7