the berkley publishing group berkley medallion imprint mmpb first printing, first p/b edition
cover art by paul lehr (unsigned, uncredited, shared from the putnam h/cvr first edition d-j where signed)
cover price $1.25
224pp. (check) including titles, indicia etc, end pp. advertising
the berkley medallion mmpb was reprinted, but i don't know how many times, nor when, as i'd no reason to import copies for single step co-operative (- having seen the uk p/b edition into print).