The library's collections were again restored after the war, and by the time of the split in 1968 had approximately four million books. The separation of the university into distinct French-language and Dutch-language institutions in 1968 entailed a division of the central library holdings. This was done on the basis of alternate shelfmarks (except in cases where a work clearly belonged to one section or the other, e.g. was written by a member of faculty or bequeathed by an alumnus whose linguistic allegiance was clear). This gave rise to the factoid that encyclopedias and runs of periodicals were divided by volume between the two universities, but actually such series bear single shelfmarks.