]]> http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=245460 ISBN http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=112005 By Hearn, Donald. Terrace University of Florida 1976 . 22 p.

]]> http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=112005 ISBN http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=84675 By Hearn, Donald. London : Prentice-Hall International, 1986 . 352 p. ; 26 cm.

]]> http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=84675 ISBN 0131653822 http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=3270 By Hearn, Donald. Englewood Cliffs, NJ : Prentice-Hall, 1986 . xvi,352p : 26cm. 0131653822

]]> http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=3270 ISBN 0135786347 http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=3743 By Hearn, Donald. Upper Saddle River, New Jersey : Prentice-Hall International, 1997 . xx, 652 p. : 27 cm. 0135786347

]]> http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=3743 ISBN http://bibliotecas.utl.pt:443/cgi-bin/koha/opac-detail.pl?biblionumber=166479 By Florian, Michael. . p. 361-394

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