TY - JOUR AU1 - Simons,, Daniel AB - Article PDF first page preview Close This content is only available as a PDF. © 1969 American Institute of Biological Sciences TI - Applied Microbiology JF - BioScience DO - 10.2307/1294687 DA - 1969-02-01 UR - https://www.deepdyve.com/lp/oxford-university-press/applied-microbiology-LyyyrtS01h SP - 179 EP - 179 VL - 19 IS - 2 DP - DeepDyve ER -