Robinson was elected secretary of the International Committee for the Nag Hammadi Codices, which had been formed in 1970 by UNESCO and the Egyptian Ministry of Culture; it was in this capacity that he oversaw the project. A facsimile edition in twelve volumes was published between 1972 and 1977, with subsequent additions in 1979 and 1984 from the publisher E.J. Brill in Leiden, entitled, "The Facsimile Edition of the Nag Hammadi Codices." This made all the texts available for all interested parties to study in some form.