This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
MAGNIFICATION OF DOUGLAS FIR ANNUAL GROWTH RINGS. TAKEN THROUGH MICROSCOPE IN NEW WESTMINSTER BRITISH COLUMBIA.... NARA .tif Scope and content General notes Local identifier DA Environmental Protection Agency Still Picture Records Section Special Media Archives Services Division NWCSS National Archives at College Park Adelphi