TY  - RPRT
TI  - Early Silurian graptolites from southeastern Alaska and their correlation with graptolitic sequences in North America and the Arctic
AU  - Michael Churkin
AU  - Claire Carter
PY  - 1970
DO  - 10.3133/pp653
UR  - https://pubs.usgs.gov/publication/pp653
ID  - pp653
ER  -