UNDER CONSTRUCTION
Industrial Hygiene Assistance for Marijuana Facilities
http://www.extractoutfitters.com/#main
Building a Safer Butane Hash Oil Extraction Facility
http://www.havelickindustrialhygiene.com/
Butane Extraction
http://en.wikipedia.org/wiki/Hash_oil
http://www.tamisiumextractors.com/
http://www.cannlabs.com/the-science/extraction/
CO2 extraction
http://www.medicaljane.com/2014/04/11/supercritical-carbon-dioxide-co2-extraction-pure-cannabis-oil/
http://www.apekssupercritical.com/