Referensi
- 1 acre permaculture farm, https://3dwarehouse.sketchup.com/model/d6ee1871-8f6c-4c64-bf82-0c56f8e79595/1-acre-permaculture-farm
- Sketchup Plants, Trees, and Shrubs Archive, https://www.onecommunityglobal.org/sketchup-plants/
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