1969 261 p., num. figs, pls & tables, paperbound. Various papers on the Cantabrian Mountains (NW Spain).
1972 245 p., num. figs, pls & tables, paperbound. Three papers on the Cantabrian Mountains (NW Spain) by M. Mohanti (Carbonate facies and Rhynchonellid paleontology), M.Ph. Michel (Polyzygia Guerich, Ostracoda) & R.K. Jonker (Fluvial sediments).