The world's most comprehensive, well documented, and well illustrated book on this subject. With extensive subject and geographical index. 30 photographs and il
Fischer has examined price records in many nations, and finds that great waves of rising prices in the 13th-, 16th-, 18th-, and 20th centuries were all marked b
The anaerobic process is considered to be a sustainable technology for organic waste treatment mainly due to its lower energy consumption and production of resi