528,019 GADEN ELMER L. /red./ Enzymatic conversion of cellulosic materials: technology and applications. Symposium Proceedings,held at Newton and Natick,Massachusetts. September 8-10,1975...Ed. Elmer L. Gaden, jr. /et al./ New York 1976 An Interscience Publ. 8° s. VI, 319, nib. 2. Biotechnology and Bioengineering Symposium nr 6