Hamburger, Viktor
On an article by M. Rose in Scientific American, December 1958, misinterpreting Holtfreter's experimental results on feedback action in embryogenesis.
Handwritten
On Hamburger's and Holtfreter's scientific biography. Remarks on Holtfreter's "artistic" workstyle.
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Handwritten
Typewritten
On his recent vacation.
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Handwritten
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Detailed description (including several drawings) of Holtfreter's recent observations on Xenopus gastrulae. On induction.