Bates, John S.; Distillation of hardwoods in Canada; Pub: Ottawa, F. A. Acland, 1922. May be downloaded from: [1]
Klar, Max; Rule, Alexander; The technology of wood distillation, with special reference to the methods of obtaining the intermediate and finished products from the primary distillate; Pub: London Chapman & Hall 1925. May be downloaded from: [2]