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Views Icon Views Article contents Figures Essay Review. Harvard Educational Review 1 December 1974; 44 (4): 459–469. doi: https://doi.org/10.17763/haer.44.4.b873618982675468 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest Search
William R. Torbert (Sun,) studied this question.