System Details Note
Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. (http://purl.oclc.org/DLF/benchrepro0212)
Source of Description
Description based on print version record. Latest issue consulted: 23rd (1992).
Available in Other Form
Print version: Environmental quality (Washington, D.C.) Microform version: Environmental quality (Washington, D.C.)