TY  - BOOK
AU  - Sapsford, Roger
AU  - Jupp, Victor
AU  - Sapsford, Roger, (ed)
AU  - Jupp, Victor, (ed)
TI  - Data collection and analysis
SN  - 076195046X
PY  - 1996///
CY  - London
PB  - Sage
KW  - Medical Statistics
ER  -