TY  - RPRT
TI  - Panel studies and response set.
AU  - C N Katz
AU  - F M Katz
PY  - 1967
DO  - 10.2466/pr0.1967.20.3.803
UR  - https://pubmed.ncbi.nlm.nih.gov/6042488/
ID  - 6042488
ER  -