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  1. 1
    Published 1947
    [Washington] 1947.
    v.
  2. 2
    Published 1946
    [Washington] 1946.
    xxi, 405 ̋. illus. 29 cm.
  3. 3
    Published 1945
    [Washington] 1945.
    409 l. illus.
  4. 4
    Published 1947
    [Washington] 1947.
    57 ̋. illus.
  5. 5
    Published 1941
    [S.l. : s.n., 1941?]
    29 leaves ; 28 cm.
  6. 6
    Published 1946
    [Washington] 1946.
    3 v. illus.
  7. 7
    Published 1943
    Washington, 1943.
    [24] p. illus.
  8. 8
    Published 1940
    [Washington? 194?]
    30 l.
  9. 9
    Published 1944
    [Washington] 1944.
    7 p. 28 cm.
  10. 10
    Published 1945
    [Washington] 1945.
    37 leaves 28 cm.
  11. 11
    Published 1946
    [Washington, 1946]
    1 v. (various pagings) illus. 29 cm.
  12. 12
    Published 1946
    [Washington?] June, 1946.
    57 l.
  13. 13
    [n.d.]
    139, [4] l. illus.
  14. 14
    Published 1945
    [Washington, 1945]
    6 l.
  15. 15
    Published 1944
    [Washington] 1944.
    23 p. 28 cm.
  16. 16
    Published 1944
    Washington, D. C., Association of American railroads, 1944.
    2 p. ̋., 24 p. diagrs. 22 x 28 cm.
  17. 17
    Published 1945
    [Washington?] 1945.
    54 l. tables.
  18. 18
    Published 1943
    Chicago, 1943.
    various paging.
  19. 19
    Published 1945
    [Washington, D.C.?] Association of American Railroads, Railroad Committee for the Study of Transportation, Subcommittee on Air Transport, 1945.
    57 ̋
  20. 20
    Published 1945
    [Washington] 1945.
    79 l.

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