Proceedings of 13th World Congress on Anaerobic Digestion 13. World Congress on Anaerobic Digestion: Recovering (bio) Resources for the World. AD13 13. World Congress on Anaerobic Digestion: Recovering (bio) Resources for the World. AD13, Jun 2013, Santiago de Compostela, Spain. Juan M. Lema, Fernando Fdez-Polanco, Marta Carballa, Jorge Rodriguez, Sonia Suarez 2013, 171 p., 2013 13. World Congress on Anaerobic Digestion: Recovering (bio) Resources for the World. AD13, Jun 2013, Santiago de Compostela, Spain. Juan M. Lema, Fernando Fdez-Polanco, Marta Carballa, Jorge Rodriguez, Sonia Suarez 2013, 171 p., 2013, Proceedings of 13th World Congress on Anaerobic Digestion