American military helicopters and vertical/short landing and takeoff aircraft since 1941 / von Johnson, E. R., 1948-

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United States Marine Corps aircraft since 1913 / von Johnson, E. R., 1948-

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United States Marine Corps aircraft since 1913 von Johnson, E. R. 1948-

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United States naval aviation 1919 - 1941 ; aircraft, airships and ships between the wars von Johnson, E. R.

Douglas DC-5, the forgotten transport von Johnson, E. R.

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Northrop attack aircraft 1933 - 1937 von Johnson, E. R.

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Water transparency observations along the east coast of North America von Williams, Jerome, Johnson, E. R. Fenimore, Dyer, Albert C.

Tactical turnabout development of the last U. S. propeller-driven attack aircraft von Johnson, E. R.

One wing or two? U.S. Navy and Marine Corps fighters 1930 - 1940 von Johnson, E. R.

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American attack aircraft since 1926 von Johnson, E. R.

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