GLOBULAR CLUSTERS AND PLANETARY NEBULAE DISCOVERED ON THE NATIONAL GEOGRAPHIC SOCIETY-PALOMAR OBSERVATORY SKY SURVEY
G. O. Abell1
© 1955. The Astronomical Society of the Pacific. All rights reserved. Printed in U.S.A.
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Citation G. O. Abell 1955 PASP 67 258
DOI 10.1086/126815
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