Index of /pdf/sphere/newsletter
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   DIR /pdf/sphere
       Programma_Jun77.pdf
       SphereUsersSociety_Mar76.pdf
       V1N1_Nov75.pdf
       V1N2_Apr76.pdf
       V1N3_Jun76.pdf
       V2N1_Nov76.pdf
       V4N1_Aug79.pdf
       V4N2_Oct79.pdf
       V4N3_Dec79.pdf
       V4N4_Feb80.pdf
       V4N5_Apr80.pdf
       V4N6_Jun80.pdf
       V5N1_Sep80.pdf
       V5N2-3_Feb81.pdf
       V5N4-5_May81.pdf