TY  - JOUR
T1  - On the Impregnation of the Ovum in the Amphibia. (Second Series, Revised.) And on the Direct Agency of the Spermatozoon
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 143
SP  - 233
EP  - 290
PY  - 1853/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1853.0010
M3  - doi:10.1098/rstl.1853.0010
AU  - Newport, G.
ER  -