Full text of the monograph by Jacob Kleinberg (University of California, Los Alamos Scientific Laboratory, Los Alamos, New Mexico and University of Kansas, Lawrence, Kansas). [PDF]

Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).

Extensive information on history, uses, occurrence, compounds, and properties.

Electronic, thermal, and steric data along with an isotope table.

Atomic structure, chemical and physical properties, and table of nuclides.

General and physical information, source, uses, biological role, key isotopes, and ionisation energies.

Basic information, atomic structure, and table of isotopes.

Basic physical and historical information.