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Filtering by: Creator Luyten, Willem Jacob, 1899-1994 Remove constraint Creator: Luyten, Willem Jacob, 1899-1994 People Aitken, Robert Grant, 1864-1951 Remove constraint People: Aitken, Robert Grant, 1864-1951 People Campbell, William Wallace, 1862-1938 Remove constraint People: Campbell, William Wallace, 1862-1938 Place Lick Observatory Remove constraint Place: Lick Observatory

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