References
- Dimond , J. B. and Sherburne , J. A. Dept. of Entomo'ogy, University of Maine . (ex Nature, Vol. 221, February 1st, 1969)
- Hickey , J. J. and Anderson , D. W. Dept. of Wildlife Ecology, University of Wisconsin . (ex Pests and Pesticides, October 11th, 1968)
- Lofroth , Goran Dr. Institute of Biochemistry, University of Stockholm . (ex New Scientist, December 5th, 1969)
- McGill , A. E. J. , Robinson , J. and Stein , M. Sittingbourne , Kent : Shell Research Ltd., Tunstall Laboratory . (ex Nature, Vol. 221, February 22nd, 1969)