TY  - BOOK
AU  - Petty,William
AU  - Morley,Henry
TI  - Essays on Mankind and Political Arithmetic
AV  - HB 
PY  - 2004///
PB  - Project Gutenberg
KW  - Population
KW  - London (England) -- Population
N1  - Public domain in the USA; Electronic text
UR  - http://www.gutenberg.org/ebooks/5619
ER  -