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Determination of production regions for pollution-free Chinese medicinal materials by geographic information system: Achyranthes bidentata (Niu Qi) in Tianjin as an example

Crossref DOI link: https://doi.org/10.1186/1749-8546-9-25

Published Online: 2014-09-19

Published Print: 2014-12

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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