2. The biological problem of to-day: preformation or epigenesis? : The basis of a theory of organic development Author(s): Hertwig, Oscar, 1849-1922, author Publication: New York : The Macmillan Co., [1900] Subject(s): HeredityGeneticsDevelopmental BiologyWeismann, August, 1834-1914.
3. Letter from Francis Crick to Igor Y. Tamm Publication: Produced: 5 December 1962 Subject(s): Genetics Archival Collection: The Francis Crick Papers (Profiles in Science)
4. Letter from Igor Y. Tamm to Francis Crick Publication: Produced: 9 November 1962 Subject(s): GeneticsGenetic Code Archival Collection: The Francis Crick Papers (Profiles in Science)
5. Letter from Lord Charles Percy Snow to Francis Crick Publication: Produced: 10 April 1969 Subject(s): GeneticsContinental Population Groups Archival Collection: The Francis Crick Papers (Profiles in Science)
6. Letter from Francis Crick to Ernst Mayr Publication: Produced: 21 April 1971 Subject(s): GeneticsIntelligenceContinental Population Groups Archival Collection: The Francis Crick Papers (Profiles in Science)
7. Letter from Ernst Mayr to Francis Crick Publication: Produced: 14 April 1971 Subject(s): GeneticsIntelligenceContinental Population Groups Archival Collection: The Francis Crick Papers (Profiles in Science)
8. Letter from Francis Crick to Lord Charles Percy Snow Publication: Produced: 17 April 1969 Subject(s): GeneticsContinental Population Groups Archival Collection: The Francis Crick Papers (Profiles in Science)
9. Letter from Sydney Brenner to Francis Crick Publication: Produced: 5 January 1978 Subject(s): EmbryologyGenetics Archival Collection: The Francis Crick Papers (Profiles in Science)
10. Letter from Francis Crick to Sydney Brenner Publication: Produced: 26 September 1977 Subject(s): GeneticsGenetic Engineering Archival Collection: The Francis Crick Papers (Profiles in Science)
