Baker & Curtis. Individual hen differences in eggshell mottling and the relationship of shell mottling (1957); 3. Baker, Curtis… Strain differences in eggshell mottling, internal quality, shell thickness, specific gravity, and the interrelationships between these factors (1958), 1960 - 1967, Box: 1, Folder: 7. Robert Baker Papers, 21-26-4030. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/1006529 Accessed August 22, 2026.