Personensuche
X
?
14
Copper deposits of Michigan by B.S. Butler and W.S. Burbank..
United States congressional serial set ; serial set no. 8616;House document / 69th Congress, 1st session. House ; no. 20
?
15
Contributions to economic geology (short papers and prelimi..
United States congressional serial set ; serial set no. 5979;House document / 61st Congress, 3rd session. House ; no. 1031