Issues for June 6, 1974-Feb. 10, 1977 called no. 1-no. 67.
Issues for Mar. 17, 1977-Dec. 8, 1977 called new ser., no. 2-no. 18 (no. 1 omitted in numbering; new ser., no. 2 called also no. 68); issue for Dec. 22, 1977 called no. 19 but constitutes new ser., no. 19.
No. 1 preceded by pilot issued: no. 0 (May 9, 1974).