589.3 Pes P Pessina , Antonio. The Physical properites and chemical applications of penicillin acylase and myrosinase / Antonio Pessina ; P. L. Luisis , examiner , J. R. Bourne , co-examiner .-- Zurich ; (s.n) , 1990. 137 p. : il. 2 microfichas opacas " A dissertation submitted to the Swiss Federal Institute of Technology CONTINUA FICHA : 2