TY  - BOOK
AU  - Blackmar,Frank W.
TI  - History of Human Society
AV  - HM 
PY  - 2009///
PB  - Project Gutenberg
KW  - Sociology
KW  - Progress
KW  - Civilization
N1  - Public domain in the USA; Electronic text
UR  - http://www.gutenberg.org/ebooks/30610
ER  -