TY  - BOOK
AU  - W.D. Wallis.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 2
PY  - 1977///.46
CY  - Winnipeg, Canada
PB  - Charles Babbage Research Center
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
N1  - 5
ER  -