Wang, Y.C. 1949: Contributions from the Institute of Botany, National Academy of Peiping 6(4)
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| Wang, Y.C. 1949: Contributions from the Institute of Botany, National Academy of Peiping 6(4) |
| Wang, Y.C. 1949: Contributions from the Institute of Botany, National Academy of Peiping 6(4) |