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1970 vol. 39, Index, no. I - VI vol. 39, no. 1 vol. 39, no. 2 vol. 39, no. 3 vol. 39, no. 4 vol. 39, no. 5 vol. 39, no. 6 vol. 40, Index, no. VII - XII vol. 40, no. 1 vol. 40, no. 2 vol. 40, no. 3 vol. 40, no. 4 vol. 40, no. 5 vol. 40, no. 6

1971 vol. 41, Index, no. I - VI vol. 41, no. 1 vol. 41, no. 2 vol. 41, no. 3 vol. 41, no. 4 vol. 41, no. 5 vol. 41, no. 6