Allen Esterson (Independent Researcher),David C. (Professor Emeritus Cassidy Hofstra University)
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Allen Esterson, David C. Cassidy, Ruth Lewin Sime
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David C Cassidy/ David C. Cassidy
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David C. Cassidy/ Gerald Holton/ F. James Rutherford
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David C. Cassidy/ Joe Barrett (NRT)
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David C. Cassidy/ Scott Bury
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