by Pennsylvania. Department of Public Instruction

1922

by Pennsylvania. Bureau of Topographic and Geologic Survey

1836

by Pennsylvania. Department of Forests and Waters

1912

by Pennsylvania. Department of Forestry

1912

by Pennsylvania

1925

by Pennsylvania. Governor (1923-1927 : Pinchot)

1927

by Pennsylvania. General Assembly

1912

by Pennsylvania State Association

1922

by Pennsylvania. General Assembly. Senate

1920

by Pennsylvania. General Assembly. House of Representatives

1919

by Pennsylvania. Commissioner of Health, Pennsylvania. Department of Health

1908

by Pennsylvania

1928