The female sex hormone ..

Mode of access: Internet.

Sex determination in the white-fly (Trialeurodes vaporariorum)

Mode of access: Internet.

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?

Sex of offspring : a modern discovery of a primeval law /

Mode of access: Internet.