Serial. Printed Ephemera Collection has: 1967:Nov.15, 1967:Dec.15, 1968:Jan.1, 1968:Jan.17, 1968:Feb.1, 1968:Mar.-1968:Apr., 1968:Sept.-1968:Dec., 1969:Feb.-1969:May, 1969:Sept., 1969:Nov., 1970:Mar.-1970:May, 1970:summer, 1971:Feb., 1971:July/Aug., 1972:Jan./Feb.-1972:May/June, 1973:Sept./Oct., 1974:May/June-1974:July/Aug., 1975:Jan./Feb.-1975:July/Aug., 1975:fall, 1976:Jan./Feb.-1976:Mar./Apr., 1976:summer-1976:fall. Some issues lack enumeration and chronology.
