TY  - RPRT
TI  - Placentation in the adder, Vipera berus.
AU  - R BELLAIRS
AU  - I GRIFFITHS
AU  - AD'A BELLAIRS
PY  - 1955
DO  - 10.1038/176657b0
UR  - https://pubmed.ncbi.nlm.nih.gov/13265805/
ID  - 13265805
ER  -