TY  - GEN
AU  - Halldal,Per
AU  - Markali,Joar
TI  - Morphology and microstructure of coccoliths studied in the electron microscope: observations on Anthosphaera robusta and Calyptrosphaera papillifera 
PY  - 1954///
CY  - Oslo
PB  - [s.n.]
ER  -