TY  - RPRT
TI  - Introduction, demography, and general methods.
AU  - N Levin
AU  - G Zasuwa
AU  - H Klinkmann
PY  - 1993
DO  - 10.1093/ndt/8.supp2.2
UR  - https://pubmed.ncbi.nlm.nih.gov/8272247/
ID  - 8272247
ER  -