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Credit
Bundle of correspondence between Pontecorvo and Professor Cyril Dean Darlington, Dr Joseph Grafton Gall, and Professor Harold Garnet ("Mick") Callan concerning Pontecorvo's decision to write up his "wild speculations about crossing over" and his request for Callan and Galls's contributions from the angle of lampbrush chromosome. In copyright. Source: Wellcome Collection.
Provider
The original material is held at <a href="http://www.gla.ac.uk/services/archives/" rel="nofollow">Glasgow University Archive Services.</a> This catalogue is held by the Wellcome Library as part of Codebreakers: Makers of Modern Genetics.