TY  - BOOK
AU  - Beals Ralph E
TI  - Statistics for economists :  An introduction   
T2  - Rand  McNally economics series Ed by Ralph E Beals
U1  - B280bX, L2 
PY  - 1972///
CY  - Chicago
PB  - Rand Mc-Nally         
KW  - Statistics
N1  - Appendix : P396-402
ER  -