1. Further Studies of Gene-Control Systems in Maize Publication: Carnegie Institution of Washington, 1963 Subject(s): Zea maysGenes, PlantCrosses, Genetic Archival Collection: The Barbara McClintock Papers (Profiles in Science)
2. Dr. H.A. Ramsay's letter to Dr. James Bryan, on the Southern negro, etc Author(s): Ramsay, H. A. Publication: Philadelphia : A. Hughes & Co., printers, 1853 Subject(s): Crosses, GeneticAfrican Continental Ancestry GroupEuropean Continental Ancestry Group
