PDP-11/20/15/r20 processor handbook.

APA Citation

Digital Equipment Corporation. (1971). PDP-11/20/15/r20 processor handbook. [Maynard, Mass.]: Digital Equipment Corporation.

MLA Citation

Digital Equipment Corporation. PDP-11/20/15/r20 Processor Handbook. [Maynard, Mass.]: Digital Equipment Corporation, 1971.

Warning: These citations may not always be complete (especially for serials).