France-Tabac, 1989, 46, p. 12-6, ISSN.0296-3361 Ridging. The making and adaptation of ridging machines JAFFRE R.
France Tabac, 1988, 40, p. 4-15, ISSN.0296-3361 A small reminder of means necessary for dark and burley tobacco curing JAFFRE R. CFPPT, Bergerac, France