The law of births and deaths.
Pell, Charles Edward.
The law of births and deaths. Being a study of the variation in the degree of animal fertility under the influence of the environment. By Charles Edward Pell. - London, T. F. Unwin, ltd. [1921] - 192 p. 23 cm.
agr22000104
Fertility.
QH471 / .P4
The law of births and deaths. Being a study of the variation in the degree of animal fertility under the influence of the environment. By Charles Edward Pell. - London, T. F. Unwin, ltd. [1921] - 192 p. 23 cm.
agr22000104
Fertility.
QH471 / .P4