Henry D. Gerhold

A Century of Forest Resources Education at Penn State

2007

Our heritage of community tree

Our heritage of community trees

2002

Compatible tree

Compatible tree

2001

Street tree factsheets

1993

Street tree factsheets, 1989

Street tree factsheets, 1989

1989

Selecting and growing better l

Selecting and growing better landscape trees for northeastern United States

1979

Breeding of Pest Resistant Tre

Breeding of Pest Resistant Trees

1966