Search for the specific paper number (e.g., Working Paper 1) on the NBER official site.
While the exact title depends on the specific database this file was pulled from, "m001ch97" typically refers to: NBER Working Paper Series. m001ch97.rar
In many instances, files with this naming convention (Chapter 1 of a specific volume) refer to works by authors like Michael D. Bordo or Anna J. Schwartz in historical economic contexts. Search for the specific paper number (e