Grupo de Quimica Organometalica at the University of Murcia (Spain).
There you will find the Worlwide Database of Organometallic Research
Centres, and other interesting news (books, highlights, honors, meeting,
postdoctoral positions, etc.)
The 1986 CODATA Recommended
Values of the Fundamental Physical Constants, this document gives the
values of the basic constants and conversion factors of physics and
chemistry recommended for international use by CODATA (at National Institute of
Standards and Technology)
WebElements, the periodic table
on the World-Wide Web. It contains much new data including sections on uses,
history, and radioisotopes.