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William Wallace Campbell postcards
Includes cards from Annie J. Cannon, Philip Fox, E.B. Frost, Johannes F. Hartmann, Annibale Riccò, Joel Stebbins, Harold Knox-Shaw and other astronomers. Cards depict Lick Observatory and other observatories in the United States and abroad.
- "Includes cards from Annie J. Cannon, Philip Fox, E.B. Frost, Johannes F. Hartmann, Annibale Riccò, Joel Stebbins, Harold Knox-Shaw and other astronomers. Cards depict Lick Observatory and other observatories in the United States and abroad."@en
- "William Wallace Campbell postcards"@en