Botanical specimens : particular directions for collecting and preserving specimens of plants : extracted from an unpublished treatise on practical botany / by John L. Riddell.
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Botanical specimens : particular directions for collecting and preserving specimens of plants : extracted from an unpublished treatise on practical botany / by John L. Riddell. Credit: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.). Public Domain Mark