R. Alcalde Campos, «Martinelli Cancilla, Phylis – Varela-Lago, Ana (eds.). ’Hidden Out in The Open. Spanish migration to the United States (1875-1930)’. Louisville: Colorado University Press, 2018. 312 pp»., Rev. Complut. Hist. Am., vol. 45, pp. 345–348, jun. 2019, doi: 10.5209/rcha.64707.