Copper: The Next Fifteen Years: A United Nations Study Natural Resource Forum Library, nr. 1 Autor W. Gluschke et al. 31 dec 1978 Hardback Preț: 642.51 lei 755.88 lei 6-8 săpt. -15%
Manganese Nodules: Dimensions and Perspectives Natural Resource Forum Library, nr. 2 Editat de The United Nations Ocean Economics and Technology Office 31 iul 1979 Hardback Preț: 642.18 lei 755.51 lei 6-8 săpt. -15%