McDivitt, James F.
Small-scale mining : a guide to appropriate equipment / prepared by James F. McDivitt, Dennis Lock ...[et al.]. - London: Intermediate Technology Pub.; 1990. - 98p. : ill. ; 28 cm.
90031137
Mining engineering.
622
Small-scale mining : a guide to appropriate equipment / prepared by James F. McDivitt, Dennis Lock ...[et al.]. - London: Intermediate Technology Pub.; 1990. - 98p. : ill. ; 28 cm.
90031137
Mining engineering.
622