It's Elemental: Sulfur - Basic physical and historical information. ChemicalElements.com: Sulfur - Basic information, atomic structure, and table of isotopes. USGS Minerals Information: Sulfur - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). Sulphur versus Sulfur - Some thoughts on the history of the spelling of the name of element 16: 'sulfur' vs 'sulphur'. EnvironmentalChemistry.com: Sulfur - Atomic structure, chemical and physical properties, and table of nuclides. Wikipedia: Sulfur - Properties of the element, including its history, applications, and characteristics. Radiochemistry of Sulfur - Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). WebElements: Sulfur - Extensive information on history, uses, occurrence, compounds, and properties of the element.