On-line systems
OCLC
OCLC c1983- 2nd ed On-line systems
Available at 1 libraries
OCLC c1983- 2nd ed On-line systems C80-4/2
OCLC c1982- 2nd ed On-line systems C80-8/2
OCLC 1980- On-line systems C80-7
OCLC c1980- On-line systems C80-1
Available at 2 libraries