From the Introduction: "This report provides historical documents and other resources related to past government shutdowns, along with brief annotations that describe the contents of the documents. The report includes links to full-text documents when available. There is limited information and guidance related to shutdowns, and it is difficult to predict what might happen in the event of one, but information about past events may help inform future deliberations. The following annotated resources are meant to guide readers to relevant materials from governmental and selected nongovernmental sources."
CRS Report for Congress, R41759
Congressional Research Service: https://crsreports.congress.gov/