TY  - BOOK
AU  - Lutz,R.R.
TI  - Graphic presentation simplified
U1  - 311.26 
PY  - 1949///
CY  - New York
PB  - Funk & Wagnalls
KW  - Statistics
KW  - Graphic methods
KW  - Frequency curves
N1  - Includes index
ER  -