| Trees -- Juvenile literature. Matches 6 items |
| Trees -- Life cycles -- Juvenile literature. Matches 1 item |
| Trees -- New England -- Identification. Matches 1 item |
| Trees -- New England -- Pictorial works. Matches 1 item |
| Trees -- North America. Matches 4 items |
| Trees -- North America -- Encyclopedias. Matches 1 item |
| Trees -- North America -- Identification. Matches 2 items |
| Trees -- Pennsylvania. Matches 1 item |
| Trees -- Pennsylvania -- Identification. Matches 1 item |
| Trees -- Pennsylvania -- Pictorial works. Matches 1 item |