Twain, Mark (Samuel L. Clemens) (edited and with An Introduction by Bernard Taper)
U. S. Deparment Of Agriculture
U. S. Department Of Agriculture (A. A. Klingebiel)
U. S. Department Of Agriculture / Soil Conservation Service
U. S. Department Of Agriculture, Alden S. Crafts
U. S. Department Of Agriculture, Alden S. Crafts
U. S. Department Of Commerce
U. S. Department Of Commerce
U. S. Department Of Commerce / Civil Aeronautics Admin.
U. S. Department Of Commercew
U. S. Department Of The Interior
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