1. ‘Garbage collection in virtual memory computer systems’;Baecker;Comm. ACM,1972
2. KRONOS 2.0 Time-sharing User's Reference Manual 1971
3. KRONOS 2.0 Batch User's Reference Manual 1971
4. ‘The programming language PASCAL’;Wirth;Acta Informatica,1971
5. KRONOS 2.0 FORTRAN Reference Manual 1971