1. Seasonal variations of copper and zinc concentrations from Iron Mountain mine in Environmental geochemistry of sulfide oxidation;Alpers;Am Chem Soc,1994
2. Annual Book of ASTM Standards;ASTM - American Society for Testing Materials;Water Environ Technol,1984
3. Observations on some deformities found in British diatoms;Barber;Microscopy,1981
4. Introduction to the Iberian Pyrite Belt;Barriga,1997
5. Schwertmannite and the chemical modeling of iron in acid sulfate waters;Bigham;Geochim Cosmochim Acta,1996