@article{wilson_1987, title={Nature tourism and enterprise development in Ecuador}, number={27}, journal={Working Paper (Forestry Private Enterprise Initiative)}, author={Wilson, M. A.}, year={1987}, pages={22} }
 @article{wilson_1987, title={Nature-oriented tourism in Ecuador: Assessment of industry structure and development needs}, number={20}, journal={Working Paper (Forestry Private Enterprise Initiative)}, author={Wilson, M. A.}, year={1987}, pages={37} }