TY  - BOOK
AU  - Christensen,Howard B.
TI  - Statistics step by step
SN  - 0395245273
PY  - 1977///
CY  - Boston
PB  - Houghton Mifflin
KW  - Statistics
N1  - Prelim. ed. published in 1974 under title: Introductory statistics; Includes index
ER  -