[1]
R. Quispe Melo, “Economic assessment and social profitability of the tourist recreation service in the Bioparque Umayo Sillustani Puno - Peru, 2015”, Sem. Econ., vol. 7, no. 1, pp. 84–102, Jun. 2018, doi: 10.26867/se.2018.v07i1.74.