"A selective guide to quality agricultural biotechnology information on the Internet...

"A guide to quality forestry and natural resources information on the Internet with over 1500 links" on urban, tropical, temperate and agroforestry...

A collection of more than "20,000 descriptions of Earth science data sets and services covering all aspects of Earth and environmental sciences...

A classified source listing for greylit ("Information produced on all levels of government, academics, business and industry in electronic and print formats not controlled by commercial publishing i...

Directory to high-quality web resources in medicine and allied health sciences, veterinary medicine, biology, natural history, agriculture and forestry, bioethics, history of medicine, and related disciplines...

A "gateway to authoritative selected science information provided by U...

A catalog of sites arranged topically by the same person who does Scott's Botanical Links Another approach to retrieving sites that deal with botany and plant science...

Well-done site with numerous links to other websites that deal with soil...