New answers tagged ambiguity
The actual document's title is: COMPTES RENDUS DES SÉANCES DE LA TREIZIÈME CONFERENCE GENERALE DES POIDS ET Officially the 13th Conference took place over both years. The actual paper's publication date is actually in May 1969. That's why they cite it as: Comptes Rendus de la 13e CGPM (1967/68), 1969, p.105 on http://www.bipm.org/en/CGPM/db/13/7/
You're going to have to look beyond Wikipedia. You need to track down the original articles in the footnotes and/or look elsewhere. Wikipedia is not an academically rigorous source of information. Assuming you are doing more than a lower high school homework assignment, you are going to have to find the source. If you are at a university, try looking on ...
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