TY  - BOOK
AU  - Chmura Kraemer,Helena
AU  - Thiemann, Sue., coaut.
TI  - How many subjects?: statistical power analysis in  research
T2  - c
SN  - 0-8039-2949-8
U1  - 001.422 1987
PY  - 1987///
CY  - Newbury Park, Calif.,
PB  - SAGE Publications
KW  - Investigación-Estadística
ER  -