ODP - Open Directory Project
"The Open Directory Project is the largest, most comprehensive human-edited directory of the Web. It is constructed and maintained by a vast, global community of volunteer editors."
Science: Chemistry: Elements: Metals:
|
|
See also:
- Business: Materials: Metals (837)
- Science: Earth Sciences: Geology: Rocks and Minerals: Metallic Deposits (25)
- Science: Technology: Metallurgy (52)
|
 |
 |
