Note 596 — Chapter XV · ON THE SHAPES OF EGGS, AND OF CERTAIN OTHER HOLLOW STRUCTURES
Reading edition
Günther, F. C., Sammlung von Nestern und Eyern verschiedener Vögel, Nürnb. 1772. Cf. also Raymond Pearl, Morphogenetic Activity of the Oviduct, J. Exp. Zool. VI, pp. 339–359, 1909.