Spanish Carboniferous megaspores and their use in stratigraphic correlation.
Foreign title:
Megasporas Carboniferas Espanolas y su Empleo en la Correlacion estratigrafica.
Reference:
Dijkstra,S.J. (1955)
Spanish Carboniferous megaspores and their use in stratigraphic correlation. [ Megasporas Carboniferas Espanolas y su Empleo en la Correlacion estratigrafica. ] Estudios GeolŠ³gicos
Vol. 11 # 2728 P. 277- 354