(Q4026)

NOERR, P.L. The virtual union catalogue. In ELAG'93: the virtual library: 17th library systems seminar, Graz/Austria,14-16 April 1993 [online]. [cit. 02-09-13] Dostupný z: https://www.bibsys.no/files/out/elag_archive/archive/elag93/papers/union1.html