Moss, W. W. , D. A* Nickle, and M. G. Emsley. A polynomial 
treatment of stridulatory file data from several species 
of the Katydid genus Ceraia ...• Notulae Naturae, 
Academy of Natural Sciences, Philadelphia, no. 432, 1970: 
1-13. "Second and fourth degree polynomial equations were 
fitted to stridulatory file data from several species 
...and plotted, using a time-sharing computer terminal.” 
[from authors' abstract.] 
Rowell, A. J. The contribution of numerical taxonomy to the 
genus concept. North Amer. Paleont. Convention, 
Chicago, 1969 [1970], Proc., Part C, pp. 264-293. 
February, 1971 
Division of Reptiles and Amphibians 
National Museum of Natural History 
Washington, D. C. 20560 
