Proctor, R.V.
Rock tunneling with steel supports with an introduction to tunnel geology - Ohio Youngstown 1946 - 271p. Illustration 26cm x 18cm
Tunneling
Structural geology
625.13 / PRO
Rock tunneling with steel supports with an introduction to tunnel geology - Ohio Youngstown 1946 - 271p. Illustration 26cm x 18cm
Tunneling
Structural geology
625.13 / PRO