A report on tetra petkus
Subtitle: a tetraploid strain of rye
By: [by C. C. Fifield, L. P. Reitz]
Contributors: Reitz, Louis Powers, 1907-; United States. Agricultural Research Service
Series: ARS 34 -- 7; ARS 34 -- 7.
Publisher: U.S. Dept. of Agriculture, Agricultural Research Service
Published: 1958
Place of publication: [Beltsville, Md.]
Language: eng
Subjects: Rye; Varieties; Research
Notes: Cover title.

At head of title: Crops research.