Vivas Moreno, Agustín, et al. “Historical-Photographical Information System for the Study of Trades: : An Example of a Technological Application for the Analysis of Photographic Documentation”. Revista Panamericana De Comunicación, vol. 2, no. 1, June 2020, pp. 133-41, https://doi.org/10.21555/rpc.v0i1.2326.