Exploration by geophysical methods, extraction and transport of hard rock inclusions during overburden removal : questionnaire / transmitted by the Government of Czechoslovakia.
1984
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Signatura
[E/ECE/]COAL/GE.5/R.31/Add.1
Título
Exploration by geophysical methods, extraction and transport of hard rock inclusions during overburden removal : questionnaire / transmitted by the Government of Czechoslovakia.
Autores
Fecha
Geneva : UN, 20 Feb. 1984.
Descripción
5 p.