First issue (v10 #1) was 4/68 and followed a bimonthly publication schedule - like BUF, for only 2 issues. The 3rd issue, which would have been Aug. was actually dated Sept. From that point on the bimonthly schedule was followed for 3 years - thru the issue dated 9/71 (v13 #3). The next issue, v13 #4 was dated 12/71, v13 #5 was dated 3/72 and the next 3 issues as well were bimonthly on the odd months (thru Sept - v14 #2). Then came v14 #3 dated 12/72 and 4 more bimonthly issues on the even months thru Aug. (v15 #1). Another 3 month break until v15 #2 dated 11/73, but then a complete 5 year run of bimonthly issues on the odd months until 11/78 (v20 #2).

Again, a break of 3 months until v20 #3, dated 2/79 appeared but then another unbroken stretch of 4 years with bimonthly issues on the even months - thru V24 #3 dated 2/83.