Hardi, P., Weidenfeld, W. Environmental Protection in East - Central Europe. Gutersloh: Bertelsmann Foundation Publ., 1994 136 с. : с табл. 3-89204-137-7.
Hardi, P., Weidenfeld, W. Environmental Protection in East - Central Europe. Gutersloh: Bertelsmann Foundation Publ., 1994 136 с. : с табл. 3-89204-137-7.
Hardi, P., Weidenfeld, W. (1994) Environmental Protection in East - Central Europe, Gutersloh: Bertelsmann Foundation Publ. 136 с. : с табл. 3-89204-137-7.
Hardi, P., & Weidenfeld, W. (1994). Environmental Protection in East - Central Europe. A Market - Oriented Approach. Gutersloh: Bertelsmann Foundation Publ., 136 с. : с табл.
Hardi P, Weidenfeld W. Environmental Protection in East - Central Europe: A Market - Oriented Approach. Gutersloh: Bertelsmann Foundation Publ.; 1994. p. 136 с. : с табл. ISBN: 3-89204-137-7.