Peel, John S.
Spirellus and related helically coiled microfossils (Cyanobacteria) from the Lower Cambrian of North Greenland - Copenhagen Gronlands Geologiske Undersogelse 1988 - pp. 5-32
CAMBRICO
CYANOPHITA
MICROFOSILES
GROENLANDIA
Spirellus and related helically coiled microfossils (Cyanobacteria) from the Lower Cambrian of North Greenland - Copenhagen Gronlands Geologiske Undersogelse 1988 - pp. 5-32
CAMBRICO
CYANOPHITA
MICROFOSILES
GROENLANDIA