"August 1967."
Other authors on title page: Robert C. Marshall, John J. Hawley, Irvin Berman, Dennis P. Considine.
"This is a more complete version of the paper 'Polytypism and the Beta-to-Alpha Transformation in Silicon Carbide,' Which was presented at the International Conference on Anisotropy of Single-crystal Refractory Materials, held in Dayton, Ohio, on 13 to 15 June 1967."
Research supoorted by the Solid State Sciences Laboratory, Air Force Cambridge Research Laboratories, L. G. Hanscom Field, Office of Aerospace Research, United States Air Force.