found: Redada de violetas, 2020:title page (Pedro Zerolo) page 291 (ex-president of COGAM y de la Federación Estatal de Lesbianas, Gays, Transexuales y Bisexuales, concejal socialista del Ayuntamiento de Madrid)
found: Wikipedia WWW site, January 28, 2021(Pedro Zerolo; Pedro González Zerolo; male; born 20 July 1960 in Caracas; died 9 June 2015 in Madrid; Spanish-Venezuelan lawyer, politician, town councilor of the city of Madrid, and LGBT activist)
found: BNE in VIAF, January 28, 2021 (Zerolo, Pedro, 1960-2015)