NEEDHAM Joseph Science and Civilization in China, 7 Vols. - Cambridge Cambridge University Press London 1998 - p. cm. - V.5: Chemistry and Chemical Technology, Pt. I : Paper and printing (574p.) By Tsien Tsuen-Hsuin 0.214583333333333,31 . Standard No.: 47 Source: 1052, 23/04/1998, Ajanta Books Textual Dewey Class. No.: Av41, K1.1-.7