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HELDEN 1bert Van a:l t’|k:l (t) (1)
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HELDEN, bert Van
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Author: HELDEN (1bert Van)
PR (N - Americanj HELDEN (1Bert Van). The Invention of the telescope. [with documents. I pp. 6. Illus. t’ol. Philadelphia, 1977’. In PHILADELPHIA. American Philosophical Society. Transactions... Vol. 67. Part L
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