Davidson, Donald A. text New York Van Nostrand Reinhold c1986 monographic xv, 373 p. : ill. ; 27 cm. "A Hutchinson Ross publication." Land use Soil geography 333 VAN 1986 A016 Or. 0442218079 https://drive.google.com/file/d/1sMyvDvj7Rc4d1h4FOYku_K_InEQ6bTdr/view?usp=sharing https://drive.google.com/file/d/1sMyvDvj7Rc4d1h4FOYku_K_InEQ6bTdr/view?usp=sharing