TY  - SER
AU  -  Boole, George, 
TI  -  An Investigation of the Laws of Thought : :  
AV  - BC 
PY  - 2005///
PB  -  Project Gutenberg, 
KW  -  Probabilities
KW  -  Thought and thinking
KW  -  Logic, Symbolic and mathematical
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/15114
ER  -