1. De Natura Fossilium;Agricola;Geol. Soc. Am., Spec. Papers,1546
2. De Re Metallica;Agricola;Mining Mag., London,1556
3. Relationships between the mineral association, chemical composition and physical properties of the chlorite series;Albee;Am. Mineralogist,1962
4. Relationship of the clay minerals halloysite and endellite;Alexander;Am. Mineralogist,1943