WBratvaag ExpeditionWEinstein refrigeratorWEismitteWKaroonda meteoriteWOctober 1930 lunar eclipseWNeutrinoWOldenburg meteoriteWParagould meteoriteWThe Physical Principles of the Quantum TheoryWThe Principles of Quantum MechanicsWSolar eclipse of April 28, 1930WSolar eclipse of October 21, 1930
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