- This report from 1973 describes the geology of southern Snohomish County.
- The map area includes eighty-five square miles in South Snohomish County southeast of Everett, bounded on the west by Interstate 5, on the south by Highway 405 and the Snohomish-King County boundary, on the east and north by the Snohomish River floodplain.
- PL/M-80 Programming Manual (bitsavers.org)
A PL/M program is a sequence of PL/M statements. The PL/M-80 Compiler accepts the statements as input and produces a machine-code program module as output. As will be seen in the remainder of this chapter, a PL/M statement may be translated by the compiler into a single 8080 instruction, or a sequence of instructions, or none at all–it may cause the compiler to allocate storage, for example, instead of producing any machine instructions.