TY  - JOUR
T1  - On the Calcification of the Vertebral Centra in Sharks and Rays
JF  - Philosophical Transactions of the Royal Society of London. Series B, Containing Papers of a Biological Character (1896-1934)
VL  - 210
SP  - 311
EP  - 407
PY  - 1921/01/01/
UR  - http://dx.doi.org/10.1098/rstb.1921.0008
M3  - doi:10.1098/rstb.1921.0008
AU  - Ridewood, W.
ER  -