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A discussion of the observations on atmospherie electricity at Helwan observatory from march 1906 to february 1908 / by H.E. Hurst.
- 551.563 H9664
- Hurst, H. E.
- National Printing Department,
- 1909.
- Cairo :
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The journal of an expedition across Venezuela and Colombia 1906-1907 : an exploration of the route of Bolivar's celebrated march of 1819 and of the battle-fields of Boyacá and Carabobo / by Hiram Bingham.
- 878.1
- Yale publishing association [etc.],
- 1909.
- New Haven, CT [etc.] :