qayum, a. (1964). cumulative marginal productivity life of plants and the optimal technology. the institute of national planning.
Chicago-Zitierstil (17. Ausg.)qayum, a. Cumulative Marginal Productivity Life of Plants and the Optimal Technology. cairo: the institute of national planning, 1964.
MLA-Zitierstil (9. Ausg.)qayum, a. Cumulative Marginal Productivity Life of Plants and the Optimal Technology. the institute of national planning, 1964.