David Lasser

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astrogation n. 1931 D. Lasser Conquest Space xiii. 207 In interplanetary travel we must develop an exact science of three-dimensional astrogation through the heavens.
astrogator n. 1931 D. Lasser The Conquest of Space 211 Surely a complete faith in the laws of mathematics and astronomy must be the first requisite of the interplanetary astrogator.