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| Methane Digesters for Fuel Gas & Fertilizer  |
Straight forward hands on text with diagrams, tables and instructions written by L. John Fry.
Originally published in 1973.
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586 |
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| Modest Experiment in Methane Gas Production |
Mother Earth News March/April 1973
This text describes a fairly easy bench scale digester set up
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709 |
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| Mother's Methane Maker |
Mother Earth News November/December 1972 |
744 |
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