TY  - BOOK
AU  - Elderton William Palin   
AU  - Johnson Norman Lloyd
TI  - Systems of frequency curves
SN  - 9.78E+12
U1  - 519.8 
PY  - 2010///
CY  - New York
PB  - CUP
KW  - Frequency curves
UR  - http://ebooks.cambridge.org/ebook.jsf?bid=CBO9780511569654
ER  -