Wilczynski, J..
The Economics of Socialsm / - Third Ed. / - New Delhi-55 : S. Chand & Company Ltd.. - p.235 :
0-04-335034-8
XM2 / L7;3
The Economics of Socialsm / - Third Ed. / - New Delhi-55 : S. Chand & Company Ltd.. - p.235 :
0-04-335034-8
XM2 / L7;3