Image:Panama-canal-shepherd-elevation.png
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[edit] Summary
BOOK SOURCE: "Historical Atlas" by William R. Shepherd, New York, Henry Holt and Company, 1923
ONLINE SOURCE: University of Texas Perry-Casteneda Map Collection, http://www.lib.utexas.edu/maps/historical/history_shepherd_1923.html http://www.lib.utexas.edu/maps/historical/shepherd/panama_canal_shepherd.jpg
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This image is in the public domain in the United States. In most cases, this means that it was published in the United States prior to January 1, 1923 or that its first publication anywhere in the world was prior to January 1, 1909 or that its copyright expired in the United States. |
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