01117cam a2200301 4500 758054190 TxAuBib 19911211120000.0 840404s1984||||||||||||||||||||||||eng|u 84007313 9780292790254 0292790252 (OCoLC)10722988 07 TxAuBib Ragsdale, Kenneth Baxter, 1917- Wings over the Mexican border [Book] : pioneer aviation in the Big Bend / from those who remember and Kenneth Baxter Ragsdale. Austin : University of Texas Press, 1984. xxv, 266 p. ; [2] p. of plates : ill., map ; 24 cm. Bibliography: p. 19911211. Johnson, Elmo. Smithers, W. D Wilfred Dudley 1895-1981. United States Air Force History. Mexico Fuerza Aérea Mexicana History. Big Bend Region (Tex) History, Military. Mexico Boundaries 1910- RV8