TY  - RPRT
TI  - Supplementary modification and introduction of code numbers to the low-latitude coccolith biostratigraphic zonation (Bukry, 1973; 1975)
AU  - H. Okada
AU  - D. Bukry
PY  - 1980
DO  - 10.1016/0377-8398(80)90016-x
UR  - https://pubs.usgs.gov/publication/70012334
ID  - 70012334
ER  -