Rockridge Center c1967
Bilger Quarry Workers 1898
Idora Park invitation 1908
Oakland Tech HS c1918
Bilger Quarry pond c1892
Bilger Quarry c1905
Bilger Quarry 1910
Bilger Quarry advertisement 1926
Bilger Quarry advertisement 1927
Frank W. Bilger c1927
Bilger Quarry site 1941
