LITERATURE CITED 



Amman, Gene D. , and Lynn A. Rasmussen. 



1969. Techniques for radiographing and the accuracy of the X-ray method for 

 identifying and estimating numbers of the mountain pine beetle. 

 J. Econ. Entomol. 62:631-634. 



Berryman, A. A., and R. W. Stark. 



1962a. Studies on the effects of temperature on the development of Ips aonfusus 

 using radiographic techniques. Ecology 43:722-726. 



Berryman, A. A., and R. W. Stark. 



1962b. Radiography in forest entomology. Ann. Entomol. Soc. Am. 55:456-466. 



Carlson, Robert W. , and Walter E. Cole. 



1965. A technique for sampling populations of the mountain pine beetle. 

 U.S. For. Serv. Res. Pap. INT-20, 13 p. 



Davich, T. B., and D. A. Lindquist. 



1962. Exploratory studies on gamma radiation for the sterilization of the boll 

 weevil. J. Econ. Entomol. 55:164-167. 



DeMars, C. J. , Jr. 



1963. A comparison of radiograph analysis and bark dissection in estimating 

 numbers of western pine beetle. Can. Entomol. 95:1112-1116. 



Fatzinger, C. W. , and J. C. Dixon. 



1965. Use of X-rays to detect southern pine beetles in shortleaf pine bark. 

 J. For. 63:451-455. 



Johnson, N. E., and H. D. Molatore. 



1961. X-ray detection of Douglas-fir beetles reared in slabs. Can. Entomol. 

 93:928-931. 



Knight, Fred B., and Waldemar Albertin. 



1966. Portable X-ray equipment: a useful tool in forest entomological field 

 research. Mich. Acad. Sci . , Arts, and Lett. 51:23-26. 



Nelson, Ralph M. 



1934. Effect of blue stain fungi on southern pines attacked by bark beetles. 

 Phytopathol. Z. 7:327-353. 



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