1
by Bolt, B.A., Horn, W.L., MacDonald, G.A., Scott, R.F.
Published 1975
Springer Berlin Heidelberg
... students in introductory courses in geology, engineering, geography, country and urban planning...

2
by Bolt, B.A., Horn, W.L., MacDonald, G.A., Scott, R.F.
Published 1977
Springer New York
... students in introductory courses in geology, engineering, geography, country and urban planning...