Serial. Printed Ephemera Collectin has: no.72-1 (1972:Jan.10)-no.72-4 (1972:Apr.14), no.72-8 (1972:May 12), no.72-10 (1972:Oct.25)-no.72-11 (1972:Dec.8), no.72-15 (1973:July 6), no.73-19 (1973:Dec.14), no.75-2 (1975:Sept.4), no.76-1 (1975:Jan.23), no.76-5 (1976:Sept.17).