523,739 ADVANCES Advances in microbial engineering.Proceedings of the 1st International Symposium on Advances in Microbial Engineering, Mariánské Lazne,Czechoslovakia,August 28-September 1,1972.Ed.: B. Sikyta, A.Prokop, and M. Novak. New York 1974 An Interscience Publication, Publ. by John Wiley and Sons 8° Biotechnology and Bioengineering Symposium no 4. P. 2. s. X, 595-1020, ilustr.