50 hikes in eastern Pennsylvania : from the Mason-Dixon Line to the Poconos and North Mountain

by Thwaites, Tom.
Published 2012

50 hikes in eastern Pennsylvania : from the Mason-Dixon Line to the Poconos and North Mountain

by Thwaites, Tom.
Published 2003

50 hikes in central Pennsylvania : from the Great Valley to the Allegheny Plateau

by Thwaites, Tom.
Published 2001

Fifty hikes in western Pennsylvania : walks and day hikes from the Laurel Highlands to Lake Erie

by Thwaites, Tom.
Published 1999