na INLIS000000000022955 20230408080817 0010-1218004793 230408 g 0 eng Principles and practice of aviation medicine / Harry G. Armstrong ARMSTRONG, HARRY G. Baltimore : The Williams and Wilkins, 1939 xii, 496 p. : ill. ; 23 cm. ills.Frontispiece 614.8 614.8 ARM p MEDICAL SCIENCES AIR TRANSPORT Incl. Bibl.--Index : 491-496 mfn-24805