The observation cards document of the work of Russell Greenberg regarding swamp sparrows. Cards are preprinted. On the front, the card lists NDI (e.g. BH4-01), nest ID (bh3-01), species abbreviation, ...
The observation cards document of the work of Russell Greenberg regarding swamp sparrows. Cards are preprinted. On the front, it lists nest ID (e.g. BB1-01), species (e.g. SWSP), plot (e.t. BB1), ...
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