References Greenhouse Covering and Glazing Materials at Reasonable Cost, Envirocept Greenhouses and Supply, www.greenhouses-etc.net/glazing/index Greenhouse Glazing and Shading, H2outhouse. com, Inc., Greenhouses, www.h2othouse.com/html/ greenhouse_glazing.html Freeman, M., 1997, Building Your Own Greenhouse. Stackpole Books, Mechanicsburg, PA Giacomelli, G. A. and Roberts, W. J., 1993, “Greenhouse Covering Systems”, HortTechnology #3, pp. 50-58 Kessler, J. R., 1998, Hobby Greenhouse Construction, ANR-1105, Alabama Cooperative Extension System, <http://www.aces.edu/pubs/docs/A/ANR-1105/
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