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Letter and form, 02.06.1972
Letter (hand-written), Ch Scherer .->A.P. Ershov, 30.04.1972
Booklet
Notification
Hand-written note, J. Rose ->A.P. Ershov, 02.06.1972
Letter, I. O. Kerner->A.P. Ershov, 16.05.1972
Letter, A. Debons->A.P. Ershov, 26.04.1972
Letter, H. Zemanek->To the members of IFIP TC2, 17.05.1972
Letter and form
Message
Postcard, W. Niegel->A.P. Ershov, 26.05.1972
Letter, I. L. Auerbach->A.P. Ershov, 13.04.1972
Letter, J. N. Buxton ->To the members of IFIP TC2, 12.05.1972
Letter, 26.05.1972
Letter, P. Branquart->J. T Guy ., 26.05.1972
Letter, J. T Guy .->P. Branquart..., 17.05.1972
Letter, G. Salton->A.P. Ershov, 30.05.1972
Letter, G. Ledin, Jr.->A.P. Ershov, 15.05.1972
Covering letter, 19.05.1972
Letter, J. Backus->A.P. Ershov, 13.04.1972
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