Appelhof, Mary. Worms Eat My Garbage. 2nd Ed. Kalamazoo, MI.  Flowerfield Enterprises, LLC.  1997. Print.

Edwards, Clive A., ed. Vermiculture Technology: Earthworms, Organic Wastes, and Environmental Management. Boca Raton, FL. CRC Press. 2011. Print.

Food and Agriculture Organization of the United Nations: On-Farm Composting Methods - Vermicomposting
http://www.fao.org/docrep/007/y5104e/y5104e08.htm#TopOfPage

Lowenfels, Jeff and Lewis, Wayne. Teaming With Microbes: The Organic Gardener's Guide to the Soil Food Web. Rev. Ed. Portland, OR. Timber Press.  2010. Print.

North Carolina State University's Vermicomposting Page.  The University, home of vermiculture/vermicompost expert Professor Rhonda L. Sherman, hosts the only conference about worm farming and mid-to-large-scale vermicomposting held in North America. Over 100 people attend each conference, from all over the U.S. and the world
http://www.bae.ncsu.edu/topic/vermicomposting/

Soil Ecology Laboratory at Ohio State University.
Home of leading vermiculture/vermicompost expert, Clive Edwards, Professor of Entomology and Environmental Sciences:
http://www.biosci.ohio-state.edu/~soilecol/

Worm Research Center.
Established in 1998, the Worm Research Center explores the technical and commercial viability of vermicomposting systems. The Center's work is supported by the Integrated Waste Systems (IWS) Research Group at the Open University, an organization with  considerable experience of large-scale composting and vermicomposting systems.
http://www.wormresearchcentre.co.uk/index.htm

U.S. Department of Agriculture – Natural Resources Conservation Service. “Composting With Worms Tipsheet”  http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/newsroom/features/?&cid=nrcs143_023541  Accessed on 2-21-2012.

IMAGE CREDITS

Figure 01: Soil Food Web - http://landscapeforlife.org/soil/3b.php

Figure 02: Worm Digestive System - http://www.wormfarmingforbeginners.com/worms-are-fun/worm-anatomy/391/

Figure 03: Small scale system - http://www.cd3wd.com/cd3wd_40/ap/CCAT%27s_Vermicomposting_Bin.html

Figure 04: Large scale system - http://www.sonomavalleyworms.com/products.php

Figure 05: Red Wiggler - http://triplegwormfarm.com/

Figure 06: Worm Wigwam - https://www.yelmworms.com/large-scale-systems/

Figure 07: Worm Factory - https://www.yelmworms.com/worm-bin-depot/

Figure 08: Windrow Vermicomposting - http://growingpower.org/worms.htm