TY  - RPRT
TI  - Thickness of 1967-69 whooping crane eggshells compared to that of pre-1910 specimens
AU  - Daniel W. Anderson
AU  - J.F. Kreitzer
PY  - 1971
DO  - 10.2307/4083896
UR  - https://pubs.usgs.gov/publication/5221755
ID  - 5221755
ER  -