1. Accumulation of diatomaceous silica in the sediments of the Gulf of California;Calvert;Bull. geol. Soc. Am.,1966
2. A discussion of the tridymite-cristobalite problem;Flörke;Silic. ind.,1961
3. Determination of opal in marine sediments;Goldberg;J. mar. Res.,1958
4. Beitrag zum Studium der Bildung des Tridymits. Mineralisatorwirkung von Feldspat und Kaolin auf die Umwandlung des Quarzes;Keyser;Ber. dt. keram. Ges.,1961
5. Diatoms from equatorial Atlantic cores;Kolbe;Rep. Swed. deep Sea Exped.,1955