Earth resources /
Skinner, Brian J. 1928-
Earth resources / by Brian J. Skinner - Englewood Cliffs, N.J. : Prentice-Hall, 1969 - ix, 149 p. : ill. ; 24 cm.
0132226537
Mines and mineral resources
Natural resources--United States
Earth resources / by Brian J. Skinner - Englewood Cliffs, N.J. : Prentice-Hall, 1969 - ix, 149 p. : ill. ; 24 cm.
0132226537
Mines and mineral resources
Natural resources--United States
