The International School for Advanced Studies (ISAS) of Trieste founded in 1978 is an international istitutions for post-graduated studies in the fields of physics, mathematics, biophysics and cognitive science. The School has produced during the period 1991-1995 the following classes of grey literature: preprints, magister and doctoral theses, proceedings and research grants, This literature is largely catalogued and stored in the library and is freely available for use by internal users. ISAS's preprints are catalogued and sent to the Italian SIGLE reference centre at the CNR Central Library of Rome. The school has also a local server of electronic preprints based on Los Alamos electronic preprints database.