DAVID N. W. GRANT
Since civilization moved north from the warm climates of the southeastern Mediterranean, man has been required to devote some part of his energies to adjusting himself to his physical environment. Historians wish to emphasize that man's migration into new environments is but an expression of progress, and tell us that the restless spirit finds its greatest examples among the hearty of a race who seek "new worlds to conquer." Be that as it may, certainly in recent times many men have not been content with conquering the surface of the earth, but have directed their energies to mastering that which
GRANT DNW. MEDICAL ASPECTS OF HIGH ALTITUDE FLIGHT1. Ann Intern Med. ;18:1006–1011. doi: 10.7326/0003-4819-18-6-1006
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Published: Ann Intern Med. 1943;18(6):1006-1011.
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