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Lankester, E. Ray (Edwin Ray), Sir, 1847-1929 (2)
Organs (2)
Organs (Anatomy) (2)
Spemann, Hans, 1869-1941 (2)
Theories (2)
Wilson, Edmund B. (Edmund Beecher), 1856-1939 (2)
Allman, George James, 1812-1898 (1)
Balfour, Francis M. (Francis Maitland), 1851-1882 (1)
Blastula (1)
Cell differentiation (1)