TY  - BOOK
AU  - Whitehead, Alfred North,
AU  - Russell, Bertrand ,
TI  - Principia mathematica: to *56 
U1  - 510.1 WHI 
PY  - 1962///
CY  - Cambridge
PB  - University Press
KW  - Mathematics
KW  - Philosophy
KW  - Logic, Symbolic and mathematical
N1  - Abriged text of v. I of principia mathematica
ER  -