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Published online by Cambridge University Press: 07 August 2017
In this contribution we present observations for a set of three clusters of galaxies at intermediate redshift (z ~ 0.2) selected from the revised Abell catalog (Abell et al. 1989, Ap.J. Suppl., 70, 1) and observed in the Gunn photometric system at the ESO 3.6m telescope in La Silla (Chile) during various runs between 1986 and 1990. This is part of a more extended project addressing the study of the distant clusters, as outlined in more detail in Molinari et al. (1990, M.N.R.A.S., 246, 576).