Bilger Quarry Workers 1898
Rockridge Center c1967
Bilger Quarry pond c1892
Bilger Quarry advertisement 1926
Bilger Quarry advertisement 1927
Frank W. Bilger c1927
Bilger Quarry c1905
Bilger Quarry 1910
Bilger Quarry site 1941
9 Oakland Paving Company Results