GURCHARAN SINGH. (1999). Plant systematics. Enfield, New Hampshire: Science.
Trích dẫn kiểu ChicagoGURCHARAN SINGH. Plant Systematics. Enfield, New Hampshire: Science, 1999.
MLA citiranjeGURCHARAN SINGH. Plant Systematics. Enfield, New Hampshire: Science, 1999.
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