01490nam a2200301 i 4500991003190909707536040803s1990 it 000 0 eng d0935584420b13037882-39ule_instDip.to Biologiaeng630.24319Helrich, Kenneth21492Official methods of analysis of the Association of official analytical chemistsOfficial methods of analysis of the Association of official analytical chemists /edited by Kenneth Helrich15 ed.Arlington :Association of Official Analytical Chemists,19902 v. ;28 cm V.1:Agricultural chemicals ; contaminants, drugs. - xxiv, 684 p. : fig., tab. ; 28 cm V.2:Food composition ; additives ; natural contaminants. - xviii, p. 685-1298 : fig., tab. ; 28 cm Agricultural chemistryTechniqueChemistry, Analytic.b1303788222-09-1103-08-04991003190909707536LE003 630 HEL01.01 V. I (1990)V. 112003000045765le003-E0.00-l- 012410.i1366050003-08-04LE003 630 HEL01.01 V. II (1990)V. 212003000045772le003-E0.00-l- 012410.i1366053603-08-04Official methods of analysis of the Association of official analytical chemists287461UNISALENTOle00303-08-04ma -engit 00