Gypsum Association (USA)
Represents manufacturers of gypsum board in the U.S. and Canada and provides technical information and assistance to the construction industry and code enforcement community regarding gypsum board.
http://www.gypsum.org/

GP Gypsum Corporation
Gypsum at Georgia Pacific Building Products. High quality gypsum wallboards and gypsum drywall from one of North America’s leading gypsum board manufacturers.
http://www.gp.com/build/ProductGroup.aspx?pid=1064

DKT Co.,Ltd.
GreenCal, Agricultural Gypsum high purity gypsum. GreenCal is suitable for agricultural to improve soils structure with natural substances.
http://www.dktgypsum.com/

Gypsum Technologies Inc.
Canada. Offers engineering design, equipment supply, project and construction management, commissioning, and technical services for the gypsum wallboard manufacturing industry.
http://www.gypsumtechnologies.com

National Gypsum Company
A fully-integrated manufacturer and supplier of products and services used worldwide in building and construction, with primary emphasis on gold bond brand gypsum wallboard and joint treatment compounds.
http://www.nationalgypsum.com

Processed Gypsum Products Australia
Offers Gypsum which is 100% natural and will increases crop quality, yields and improve soil structure. Hi-Ag, Turf-Gyp, Micro-Gyp products benefit a wide range of agricultural enterprises.
http://www.pgp.com.au

Loons Forever: Writings on Nature and Nature Conservation
Environmental education through nature writing on natural history, nature interpretation, environmental ethics, conservation policy and heritage values, including nature stories, fables, essays, plays, songs and animated poems.
http://www.loonsforever.com

Pfeiffer Nature Center -building knowledge of our natural world
Pfeiffer Nature Center is a non-profit, tax exempt organization with the purpose of building a foundation of knowledge, understanding, and appreciation for the intrinsic value and aesthetic qualities of our natural world.
http://www.pfeiffernaturecenter.org

In Search of Nature: Imagining the Precolumbian Landscapes
Ideas of nature never exist outside of a cultural context, and the meanings we assign to nature cannot help reflecting that context.
http://www.cc.ku.edu/~hoopes/nature.html

RNA Interference at Journal Nature
RNA interference: A Nature Reviews journals web focus on RNAi - a selection of recently published Reviews, Perspectives and Highlights on this topic.
http://www.nature.com/focus/rnai/