Additional morphographic information on some characteristic acritarchs of the San Pedro and Furada Formations (Siluria-Devonian boundary) in Leon and Asturias, Spain.
Reference:
Cramer,F.H. (1966)
Additional morphographic information on some characteristic acritarchs of the San Pedro and Furada Formations (Siluria-Devonian boundary) in Leon and Asturias, Spain. Instituto geolгgico y minero de Espaбa, Notas y Comunicaciones
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