Serpula vermicularis
Exercise from Invertebrate Anatomy OnLine covering the systematics, behavior and external anatomy of this feather duster worm.
http://webs.lander.edu/rsfox/invertebrates/serpula.html

Multi Glory International Feather Co., Ltd
China. Feather and down filled quilts, comforters and pillows. Also, garments and sleeping bags. Commercial processors of feather and down. Detailed product specifications. English and Chinese.
http://www.chinadownfeather.com

IDFB. International Down an Feather Bureau
Austria. International association of processors and producers of feather and down material and finished products, and traders and testing institutes in the feather and down industry.
http://www.idfb.net/

United Feather & Down, Inc
Founded in Europe 200 years ago, United Feather & down sells quality bedding products to the hospitality industry, retail buyers, and down and feather buyers. Products include bedding accessories blankets, mattress pads, and pillows.
http://www.ufandd.com/

Down and Feather Articles
Extensive list of technical articles dealing with standards, regulations and labeling, testing, procedures and tolerances, studies and pricing of feather and down. From the International Feather and Down Laboratory.
http://www.idfl.com/articles/

CFDIA. China Feather & Down Industrial Association
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http://www.cfd.com.cn/

Sea Feather Co., Ltd
China. Manufacturers of white and grey, goose and duck down and feather filled comforters, pillows, cushions and mattress protectors. Also, ready-made outerwear, and commercial processors of duck and goose down and feather. English and Chinese.
http://www.theseafeather.com/

European Down & Feather Association (EDFA)
EDFA - European Down and Feather Association
http://www.edfa-mainz.de/

Highland Feather, Inc
Canada. Down and feather filled quilts, duvets and pillows. Distributor of bath and bedroom linens.
http://www.highlandfeather.com/

Pac-Fung Feather Co., Ltd
Hong Kong. Design and manufacture of feather and down, and polyester filled quilts and pillows. Also, woven blankets, and bed linens.
http://www.pac-fung.com.hk/