HP Printer Research Breakthrough Might Enlighten... Solar Industry?
HP had a recent announcement that it will license technology it co-developed with
This may be an item such as you would review, but I don't know: Regardless, you may be interested in the newly reprinted Complete Biogas Handbook, which has been given strong favorable reviews by Mother Earth News, J. Baldwin, et al. (See the website for full information and downloads of selected chapters and appendices.)
Please contact me if you have any questions.
David William House
"The Complete Biogas Handbook" www.completebiogas.com