Books by S. R. Petrick:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Petrick, S. R. (Stanley Roy): On the relative efficiencies of context-free grammar recognizers (L.G. Hansom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1965., 1965), also by T. V. Griffiths, Air Force Cambridge Research Laboratories (U.S.), and United States. Air Force. Office of Aerospace Research (page images at HathiTrust)- Petrick, S. R. (Stanley Roy): A program for transformational syntactic analysis (L. G. Hansom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1966., 1966), also by Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
Find more by S. R. Petrick at your library, or elsewhere.