TY  - GEN
AU  - Walter,S D
AU  - Morgenstern,H
TI  - A note on optimal sampling for the comparison of proportions or rates
SN  - 0277-6715
PY  - 1986///0318
KW  - Sampling Studies
N1  - Publication Type: Comparative Study; Journal Article
UR  - https://doi.org/10.1002/sim.4780040415
ER  -