Responsible director: 
Neria De Giovanni
 
Pagination and diagrams: 
Sergio Bolgeri 

Editing collaborators: 
Giuditta Marras, Ivan Perella 

Tranlated from Italian by  Dr. Ahmed Legrouri

Editing: 
Via Manzoni 67 - 07041 Alghero (SS) - Italy
tel. & fax : +39.79.981621