TY  - RPRT
TI  - Infrequently occurring activities and contexts in time use data.
AU  - P J Stone
AU  - N A Nicolson
PY  - 1987
DO  - 10.1097/00005053-198709000-00003
UR  - https://pubmed.ncbi.nlm.nih.gov/3655777/
ID  - 3655777
ER  -