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Detection of Submarines
Published in Proceedings of The American Philosophical Society, in 1920, in volume 59, issue 220, pages 1-47
The Einstein Theory
Published in Proceedings of The American Philosophical Society, in 1920, in volume 59, issue 220, pages 176-183
Slav and Celt
Published in Proceedings of The American Philosophical Society, in 1920, in volume 59, issue 220, pages 184-193
Golgotha
Published in Proceedings of The American Philosophical Society, in 1920, in volume 59, issue 220, pages 237-244