Proceedings of the fourth International Seaweed Symposium, Biarritz - September 1961 = Comptes rendus du IVe Congrès International des Algues Marines, Biarrits - September 1961 - International Seaweed Symposium; Davy de Virville, Ad. (Adrien); Feldmann, J. (Jean) (Symposium Publications Division, Pergamon Press, 1964)