TY  - BOOK
AU  - Whitehead, Alfred North
AU  - Russell, Bertrand
TI  - Principia mathematica to *56
U1  - 510   
PY  - 1962///
CY  - New Delhi
PB  - Cambridge University Press
KW  - Mathematics
KW  - Molecular prepositions
KW  - Algebra
KW  - Mathematica
ER  -