1988 National Bureau of Standards’ Management Guide to Software Reuse (PDF 2.2 MB) https://www.govinfo.gov/content/pkg/GOVPUB-C13-dca04f7b7fc21321e39de88b35b2f1d3/pdf/GOVPUB-C13-dca04f7b7fc21321e39de88b35b2f1d3.pdf