TY  - GEN
AU  - Haldane J B S
TI  - Possible worlds 
AV  - Q171 
U1  -  500 
PY  - 1940///
CY  - London.
PB  - Evergreen Books
KW  - Science
KW  - Medicine
KW  - Religion and science
N1  - Originally published: Possible worlds and other essays. London : Chatto & Windus, 1927
ER  -