TY - BOOK AU - Preston,Richard Joseph TI - North American trees: exclusive of Mexico and tropical Florida SN - 0813811724 (pbk.) AV - QK110 .P74 1989 U1 - 582.16097 19 PY - 1989/// CY - Ames PB - Iowa State University Press KW - Trees KW - United States KW - Identification KW - Canada ER -