Boltz, David Ferdinand Colorimetric determination of nonmetals - 2 ed. - New York : Wiley, 1978 - 543 p. : ilus. ; gráfs. - Chemical analysis ; 8 . - Chemical analysis ; 8 . LCCN: 19966 Subjects--Topical Terms: Colorimetría. Dewey Class. No.: 545.8 / B6 1978