paeonia peony punkodirozsa pivoines pfingstrosen pivonia |
Carsten Burkhardt's Web Project Paeonia - Regional Themes Peony Societies & Groups |
Carsten Burkhardt's Web Project Paeonia - Regionale Themen Päoniengesellschaften & Gruppen |
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The Peony Association of China |
Wang Liangying et. al. (1998), Chinese Tree Peony, China Forestry Publishing House, ISBN 7-5038-2019-5 |
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