sachse, e. (1962). some experience and problems of manpower planning. the institute of national planning.
Tohutoru Kātū Chicago (17th ed.)sachse, e. Some Experience and Problems of Manpower Planning. cairo: the institute of national planning, 1962.
Tohutoro MLA (9th ed.)sachse, e. Some Experience and Problems of Manpower Planning. the institute of national planning, 1962.
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