Titolo
New methods of winning : definition of a possible alternative methods of coal extraction aimed at reduction in manual dependence and cost and increase in utilization of colliery reserves
Descrizione
New methods of winning : definition of a possible alternative methods of coal extraction aimed at reduction in manual dependence and cost and increase in utilization of colliery reserves / NCB, London
Descrizione Fisica
31 p., [6] p. di tav. : ill. ; 30 cm
Note
In testa al frontespizio: Commission of the European Communities.
Commenti