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Growth in Trees
Published in Proceedings of The American Philosophical Society, in 1921, in volume 60, issue 220, pages 7-14
Rose Atoll, American Samoa
Published in Proceedings of The American Philosophical Society, in 1921, in volume 60, issue 220, pages 62-70
The Peopling of Asia
Published in Proceedings of The American Philosophical Society, in 1921, in volume 60, issue 220, pages 535-545
The Coudersport Ice Mine
Published in Proceedings of The American Philosophical Society, in 1921, in volume 60, issue 220, pages 553-559