00654cam a22002291 4500 agr64000272 DLC 20260227111023.0 800221s1964 dcua f000 0 eng agr64000272 (OCoLC)6007180 DLC NIC OCoLC DLC premarc QK479 .U5 A 77.502:Ar 1/2 United States. Agricultural Research Service. The National Arboretum for research and education. [Washington, 1964] [12] p. (incl. cover) illus. 20 x 27 cm. Cover-title. National Arboretum (U.S.) 11939 11939