Bibliography of Alexander, Polly, by subject:

•	Washington (D.C.) -- Description and travel (2)
•	Trees -- Washington (D.C.) (2)
•	Trees in cities -- Washington (D.C.) (2)
•	Science -- Earth Sciences -- Environmental Science (1)
•	Science -- Biological Sciences -- Plants -- Trees -- General (1)
•	Travel -- United States -- Washington, D.C (1)
•	Travel -- General AAS (1)
•	Travel -- General (1)
•	Travel -- United States -- States -- Vermont (1)
•	Travel -- Specialty Travel -- Ecotourism (1)
•	Professional & Technical -- Professional Science -- Earth Sciences -- Environmental Science (1)
•	Science -- Biological Sciences -- Botany -- General (1)
•	Travel -- Reference & Tips -- Guidebooks (1)
•	Travel -- United States -- Regions -- South -- South Atlantic (1)
•	Science -- Biological Sciences -- Botany -- General AAS (1)
•	Outdoors & Nature -- Reference (1)
•	Trees in cities -- Washington (D.C.) -- Identification (1)
•	Trees -- Washington (D.C.) -- Identification (1)
•	Washington (D.C.) -- Description -- 1981-Guide-books (1)
•	History -- Americas -- United States -- State & Local -- Vermont (1)