Guidebook to places of geologic interest in the Lehigh Valley, Pennsylvania / by Benjamin LeRoy MillerMiller, Benjamin L. (Benjamin LeRoy), 1874-1944 · First published 1939Open the Tome
Northampton County, Pennsylvania / by Benjamin LeRoy Miller, Donald MacCoy Fraser and Ralph LeRoy Miller.Miller, Benjamin L. (Benjamin LeRoy), 1874-1944. · First published 1939Open the Tome
Limestones of Pennsylvania / by Benjamin LeRoy Miller.Miller, Benjamin L. (Benjamin LeRoy), 1874-1944. · First published 1925Open the Tome
Lead and zinc ores of Pennsylvania / by Benjamin LeRoy Miller.Miller, Benjamin L. (Benjamin LeRoy), 1874-1944. · First published 1924Open the Tome
