PL1 in easy stages
Subtitle: a programmed learning textbook
By: J. S. Roper.
Edition: American ed. / edited by Stan Rifkin.
Publisher: Dickenson Pub. Co.
Published: 1974
Place of publication: Encino, Calif
Language: eng
Number of pages: 143
Subjects: PL/I (Computer program language) -- Programmed instruction.
Notes: Includes index.