Oh, H. K., Sakai, T., Janes M. B., and Longhurst, W. M. 
1967. The effect of various essential oils isolated 
from Douglas-fir needles upon sheep and 
deer rumen microbial activity. Appl. Micro- 
biol. 15: 777-784. 
Pearson, H. A. 
1965. Rumen organisms in white-tailed deer from 
South Texas. J. Wildlife Manage. 29(3): 
493-496, illus. 
Raleigh, Robert J., and Turner, Harley A. 
1968. Biuret, urea, and cottonseed meal as a supple- 
mental nitrogen for yearlings on range for- 
age. Oreg. Agr. Exp. Sta. Spec. Rep. 251: 
9-15. 
Silver, H. N., Coloros, F., and Hayes, H. H. 
1959. Basal metabolism of white-tailed deer, a pilot 
study. J. Wildlife Manage. 23(4): 484-488. 
Short, H. L. 
1964. Postnatal stomach development of white-tailed 
deer. J. Wildlife Manage. 28: 445-458. 
, Medin, D. E., and Anderson, A. E. 
1965. Rumino reticular characteristics of mule deer. 
J. Mammal. 46(2): 196-199. 
Virtanen, Artturi I. 
1966. Milk production of cows on protein-free feed. 
Science 153: 1603-1614. 
Warner, A. C. I. 
1965. Factors influencing numbers and kinds of mi- 
croorganisms in the rumen. Jn Physiology of 
digestion in the ruminant. Ed. by Dough- 
erty, R. W. Washington, D.C.: Butter- 
worths, Inc., 480 pp. 
1961. Some factors influencing the rumen microbial 
population. J. Gen. Microbial. 28: 129-146. 
163 
