TY  - BOOK
AU  - Thorn, Eric A.
TI  - Understanding copyright: a practical guide 
SN  - 1870404033 :
PY  - 1989///
CY  - Tunbridge Wells
PB  - Jay Books
KW  - Copyright;Microcomputers
N1  - Includes bibliographical references (p. 126) and index
ER  -