Genre
Forests and forestry
/
Pennsylvania
/
Periodicals
/
Forests and forestry
/
Societies, etc
and 4 more
.
Names
leaves
/
wood
/
soil
/
called
/
bark
and 2629 more
Genre
n-us-pa
/
Philadelphia (Pa.)
/
Learned institutions and societies
/
Science
/
Periodicals
.
Names
american
/
par
/
paris
/
lea
/
la
and 2171 more