TY  - SER
AU  -  Langlois, Charles Victor, 
TI  -  Introduction to the Study of History 
AV  - D 
PY  - 2009///
PB  -  Project Gutenberg, 
KW  -  History -- Study and teaching
KW  -  Historiography
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/29637
ER  -