Canada Land Inventory.
Michael O. Webb
Wojciech Jankowski
Experimental Cartography Unit.
Wu Chuanjun
Thomas Milne
N. L. Nicholson
Comprehensive Planning Organization
Faqir Mohammad Khan.
J. L. Agatsiva
J. S. Schubert
J. B. Harley
Unknown Author
Wendy Simpson-Lewis
United States. Army. Corps of Engineers. Seattle District. Environmental Resources Section.
Quocheng Sung
Peter Allan Burrough
John Lossing Buck
Kim Dovey
Indonesia. Badan Penelitian dan Pengembangan Pertanian