Qayum, A.
Cumulative marginal productivity, life o plants and the optional technology / A. Qayum - Cairo : INP , 1964 - 19p. ; 32 cm.
Includes bibliographical references and index.
Economic theory
330.1 / QAY
Cumulative marginal productivity, life o plants and the optional technology / A. Qayum - Cairo : INP , 1964 - 19p. ; 32 cm.
Includes bibliographical references and index.
Economic theory
330.1 / QAY