TY  - BOOK
AU  -  Madsen, ole lehrmann 
TI  -  Object-oriented programming in the beta programming language / Ole Lehrmann Madsen 
SN  - 0201624303
U1  - 005.133 MAD 
CY  -  Addison wesley 
KW  -  Object-oriented programming              beta (computer program language)
ER  -