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The current subscription began on 02/01/2018 and is issued every 2 months for 6 issues
The first subscription was started on 02/01/2017
Vol. 72, No. 1; Vol. 72, No. 2; Vol. 72, No. 3; Vol. 72, No. 4; Vol. 72, No. 5; Vol. 72, No. 6; Vol. 72, No. 7; Vol. 73, No. 2; Vol. 73, No. 3; Vol. 73, No. 4; Vol. 73, No. 5; Vol. 73, No. 6; Vol. 74, No. 10
