TY  - SER
AU  -  Russell, Bertrand, 
TI  -  Tractatus Logico-Philosophicus 
AV  - B 
PY  - 2010///
PB  -  Project Gutenberg, 
KW  -  Logic, Symbolic and mathematical
KW  -  Language and languages -- Philosophy
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/5740
ER  -