NJ, Univ., Dep. of Economics, Diss.--Princeton, 1971. / Kopie, ersch. im Verl. UMI, Ann Arbor, Mich. - Enth. 3 Beitr.
| Identifer | oai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/253912638 |
| Date | January 1971 |
| Creators | Heckman, James Joseph. |
| Source Sets | OCLC |
| Language | English |
| Detected Language | English |
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