Draft circular letter on standardisation of materials, documents and calculations, with related tables, 20/01/1961.
Correspondence, draft agenda and minutes of the meeting of the Steering Committee in Brussels on 05-07/04/1961. Relevant subjects: functioning of OEEPE and methods for amelioration, reports by the Presidents of the scientific commissions, new presidency of the Steering Committee.
Correspondence, draft agenda and minutes of the meeting of the Steering Committee in Berlin on 20-21/10/1961. Relevant subjects: status of the negotiations on the accession of other nations to the OEEPE, development of cooperation between OEEPE and SIP, planned publications of OEEPE members, reports of the presidents of the Commissions

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