DE GRACIA, C., HESSE, E., JOHNSON, J., GARCIA, F., OROZCO, M. E., AMADOR, E., & CABALLERO, J. J. (1997, Januar 1). Selecting and adapting a second-generation integrated library system (ILS) and extending it to users worldwide via the Internet. 42(3-4). Wallingford: International Association of Agricultural Information Specialists, 1997. Abgerufen von http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=2394003

DE GRACIA, C, HESSE, E, JOHNSON, J, GARCIA, F, OROZCO, M. E, AMADOR, E und CABALLERO, J. J, 1997. Selecting and adapting a second-generation integrated library system (ILS) and extending it to users worldwide via the Internet. In: [online]. Wallingford: International Association of Agricultural Information Specialists, 1997. 1 Januar 1997. Available from: http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=2394003

DE GRACIA, C., E. HESSE, J. JOHNSON, F. GARCIA, M. E. OROZCO, E. AMADOR, und J. J. CABALLERO. Selecting and adapting a second-generation integrated library system (ILS) and extending it to users worldwide via the Internet. Nr. 3-4, Wallingford: International Association of Agricultural Information Specialists, 1997., 1997, http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=2394003.

DE GRACIA, C., HESSE, E., JOHNSON, J., GARCIA, F., OROZCO, M.E., AMADOR, E. und CABALLERO, J.J. (1997), „Selecting and adapting a second-generation integrated library system (ILS) and extending it to users worldwide via the Internet“, in , Bd. 42, Wallingford: International Association of Agricultural Information Specialists, 1997., verfügbar unter: http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=2394003.