TY  - RPRT
TI  - How one thing has led to another.
AU  - G Klein
AU  - E Klein
PY  - 1989
DO  - 10.1146/annurev.iy.07.040189.000245
UR  - https://pubmed.ncbi.nlm.nih.gov/2653367/
ID  - 2653367
ER  -