Families and genera of spermatophytes recognized by the Agricultural Research Service
By: Charles R. Gunn ... [et al].
Contributors: Gunn, Charles R.; United States. Department of Agriculture.; United States. Agricultural Research Service.
Series: Technical bulletins / United States, Department of Agriculture -- no.1796; Technical bulletins (United States, Department of Agriculture) -- no.1796.
Publisher: United States, Department of Agriculture
Published: 1992
Place of publication: [Washington, D.C.]
Language: eng
Number of pages: 500