Wang C L, Baldwin B B, Fulghum R S, Williams P P
Appl Microbiol. 1969 Oct;18(4):677-9. doi: 10.1128/am.18.4.677-679.1969.
Fifteen species of ruminal bacteria were tested against 10 antibiotics in concentrations ranging from 0.1 to 200 mug/ml in an anaerobic tube dilution system.