1. Ice crystal markings;Allan;Am. J. Sci.,1962
2. Gumbotil and interglacial clays;Allen;Bull. Geol. Soc. Am.,1960
3. The last galciation;Antevs;Am. Geograph. Soc., Res. Ser.,1928
4. Quaternary geology of Treskelen, Hornsund, Vestspitsbergen;Birkenmajer;Studia Geol. Polon.,1964