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biodiversity heritage library digital library open access field book project biodiversity transcription fieldbooks smithsonian field notes botany metadata eac kenya field books eac-cpf cataloging digitization mods ncd connecting content botanical and horticultural libraries cbhl spnhc bsow access edit-a-thon wikipedia archival collections bhl@10 aetfat tdwg user experience user needs ndsr biodiversity information standards georeferencing search crowdsourcing