Trees of Iowa.
Campbell, Richard B.
Trees of Iowa. - 1961. - s. 63 : il. ; 28 cm. - Bulletin. Iowa State University of Science and Technology P-121 . = Bull. Agric. Home Econ. Exper. St. N. Iowa State Univ.
Trees of Iowa. - 1961. - s. 63 : il. ; 28 cm. - Bulletin. Iowa State University of Science and Technology P-121 . = Bull. Agric. Home Econ. Exper. St. N. Iowa State Univ.