This subseries comprises correspondence, real estate records, legal papers, financial records and other materials that document Erickson's professional relationship with Dorr Legg, ONE, Incorporated and the Institute for the Study of Human Resources (ISHR). After first meeting Dorr Legg in the early 1960s, Erickson began donating funds to ONE on a regular basis, which was a substantial resource for ONE's on-going research and educational operations. Erickson is also largely responsible for the founding of ISHR, a non-profit organization primarily created to allow ONE to accept charitable donations. The materials in this series document the decades-long relationship between Erickson, ONE, Inc., and ISHR.