Items where Author is "Heldring, L.J."
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Heldring, L.J. De behandeling van de Kaspischen wilg, [Salix acutifolia] op hooge zandgronden. Arnhem : UNSPECIFIED. , 1877
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Heldring, L.J. De behandeling van de Kaspischen wilg, [Salix acutifolia] op hooge zandgronden. Arnhem : UNSPECIFIED. , 1877