www.swsbm.com/
School of botany, medicine in Arizona (USA)

www.anachem.umu.se/eks/
American site for chemistry teaching resources

www.kessinger.net
American site that publishes and digitizes rare books

www.labx.com
American site where Laboratory equipment can be purchased from anywhere. attractive prices

www.ritmanlibrary.nl
The Bibliotheca Philosophica Hermetica (BPH) is a user library located in the heart of Amsterdam. The library has been renovated. founded by businessman Joost R. Ritman from Amsterdam, who decided to develop the company. to make its collections part of the public domain in 1984.

www.sciplus.com
American scientific surplus site