Will it be a boy? Sex-determination according to superstition and to science,

London edition (G. Allen & Unwin, Ltd) has title: Is it a boy?

Sexual behavior in penguins

Mode of access: Internet.

Considérations sur l'être vivant ...

2. ptie. L'individu, la sexualité, la parthénogénèse et la mort, au point de vue orthobiontique.--3. ptie. La characée considérée au point de vue orthobiontique.

Essays of a biologist,

Bibliographies at end of chapters.

Sex antagonism,

Introductory.--The problems.--Exogamy.--Totemism.--Maternal impressions and birth-marks.--Biology and Dr. Frazer's theory.--Primitive and modern sex antagonism.