TY  - SER
AU  -  Davis, Calvin Olin, 
TI  -  A Guide to Methods and Observation in History : :  
AV  - D 
PY  - 2007///
PB  -  Project Gutenberg, 
KW  -  History -- Study and teaching
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/20893
ER  -