TY  - BOOK
AU  - Spear,Mary Eleanor
TI  - Charting statistics / 
U1  - 519.0222 SPE 
PY  - 1952///
CY  - New York : 
PB  - Mc Graw-Hill Book Company, Inc., 
KW  - Gaphic methods
KW  - Statistics
N1  - Includes index.
ER  -