Parker.S.P. & Others. Ed. Mcgraw-Hill Encyclo.Of Sci.&Techno./6.[Gap-Hys] - 5th Ed. - Tata McGraw-Hill Publishing Company Limited 1982 - VIII, 814p. 22 cm. Text in English Subjects--Facted Index Terms: REF Dewey Class. No.: 503.21 / PAR