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The Teaching of Astronomy

Published online by Cambridge University Press:  14 August 2017

John R. Percy
John R. Percy*
Affiliation:
David Dunlap Observatory

Abstract

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Type
National Newsletter
Information
International Astronomical Union Colloquium , Volume 18: Orbital and physical parameters or double stars , 1973 , pp. L5 - L6
Copyright
Copyright © The University of Toronto Press, Royal Astronomical society of Canada 1973