Copy: 1
no. 1 (Jan 1953)- no. 9 (Dec 1955)
v. 15, no. 2 (Jul 1968)
v. 16, no. 2 (Jul 1969)
v. 17, no. 1 (Mar 1970)- v. 17, no. 3 (Nov 1970)
v. 18, no. 2 (Jul 1971)- v. 25, no. 2 (Nov 1978)
v. 26, no. 2 (Nov 1979)- v. 27, no. 1 (Jul 1980) Irregular Dating
v. 27, no. 2 (Nov 1980)- v. 32, no. 2 (Nov 1985)