Autor
Pflüger, Alf
2
Belluzzi, Odone
1
Benetti, Lucas
1
Bengoa, Leandro N.
1
Busto, J. L.
1
COMAU
1
Forestier, V.
1
Gines, Marcelo J. L
1
Gray, W. S.
1
Groote, J. P. de
1
Maynard, J. Barry
1
Medina, Hernán
1
Pinner, R.
1
Safranez, Carlos
1
Sanmarco, Enrique
1
United States. Bureau of Mines
1
Varlet, Henri
1
Vickers
1
Wernick, S.
1
Wilcox, L. B.
1
Yges Gomez, Luis
1