00306nam a2200109Ia 4500008004100000082001800041100001500059245005000074260002700124300001100151650003400162240817s9999    xx            000 0 und d  a574.192 B77,c  aBracken,A. 0aChenistry of micro-organismsby arthur bracken  c1955a Londonb Pitman  a343 p.  a Chenistry of Micro-organisms