TY  - RPRT
TI  - Shotshell and shooter effectiveness: Lead vs. steel shot for duck hunting
AU  - D.D. Humburg
AU  - S.L. Sheriff
AU  - P.H. Geissler
AU  - T. Roster
PY  - 1982
UR  - https://pubs.usgs.gov/publication/5221770
ID  - 5221770
ER  -