BISG Newsletter 11 (January 1977)
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BISG Newsletter 10 (June 1976)
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BISG Newsletter 9 (May 1975)
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BISG Newsletter 8 (July 1974)
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BISG Newsletter 7 (January 1973)
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BISG Newsletter 6 (April 1972)
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BISG Newsletter 5 (August 1971)
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BISG Newsletter 4 (January 1971)
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BISG Newsletter 3 (May 1970)
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BISG Newsletter 2 (November 1969)
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