N H Tarras-Wahlberg

Environmental management of small-scale and artisanal mining: the Portovelo-Zaruma goldmining area, southern Ecuador.

N H Tarras-Wahlberg, N. Tarras-Wahlberg, 2002, Journal of environmental management.

Environmental impacts and metal exposure of aquatic ecosystems in rivers contaminated by small scale gold mining: the Puyango River basin, southern Ecuador.

N H Tarras-Wahlberg, S. Lane, N. Tarras-Wahlberg, 2001, The Science of the total environment.