Permanent press

Tree Crops: A Permanent Agriculture. Island Press. ISBN 0-933280-44-0 Whitefield, P. 2002. How to Make a Forest Garden. Hampshire: Permanent Publications

2007, ISBN 978-1-902339-66-5  ("The Kingdom has no rivers, lakes or any permanent body of standing water..."). Tuvalu, The World Factbook, Central Intelligence

in the Seikado Foundation Ten Oxherding Pictures, attributed to Shūbun Landscape in the Seattle Art Museum Permanent Collection, attributed to Shūbun

"Chinese", 1930. J. Percy Bruce (editor), "Farmers of forty centuries; or, Permanent agriculture in China, Korea and Japan.", 1926 Da Zheng. Chiang Yee: The

Lennox Robinson. Salem Press. June 2003: 2466 [25 November 2011]. ISBN 978-1-58765-107-6. （原始内容存档于2017-04-08）.  Lotus. Permanent Bureau of Afro-Asian Writers