Author
DeLorme Mapping Company
4
Kittatinny Canoes
3
Pennsylvania. Bureau of Maps
2
ADC (Firm)
1
Eastern Gateway Travel Council (Martinsburg, W. Va.)
1
Fairmount Park Commission (Philadelphia, Pa.)
1
Friends of the Wissahickon
1
Hagstrom Map Company
1
Harris, John Paul
1
Hermann, Michael J.
1
Jim Thorpe River Adventures
1
Lippman, Helen, 1947-
1
National Recreation Association
1
Northern Cartographic, Inc
1
Philadelphia Olympic Athletic Association
1
Potomac Highland Travel Council
1
Puetz, C. J.
1
Purple Lizard Publishing (Firm)
1
Reardon, Patricia, 1935-
1
West Virginia. Div. of Parks and Recreation
1
Zatz, Arline, 1937-
1
Zatz, Joel L., 1935-
1