Transformations on tourism trends and their impact on the environment: a case study in the province of Ávila
págs. 1-17
Sustainability and new information and comunication technologies
Alfredo Tolón Becerra, Xavier Bolivar Lastra Bravo, José Fernando Bienvenido Bárcena, Joaquín García Sobrino
págs. 18-34
págs. 35-44
Energetic alternatives to the nuclear technology
Fernando Blanco Silva, Gabriel Pereiro López, Alfonso Isidro López Díaz, Rosa María Regueiro Ferreira
págs. 45-53
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