TY  - RPRT
TI  - Stratigraphic distribution and zonation of Jurassic (Callovian) ammonites in southern Alaska
AU  - Ralph Willard Imlay
PY  - 1975
DO  - 10.3133/pp836
UR  - https://pubs.usgs.gov/publication/pp836
ID  - pp836
ER  -