Dormancy in lettuce seed and some factors influencing its germination
By: by Ross C. Thompson.
Contributors: United States. Dept. of Agriculture.
Series: Technical bulletin / United States Department of Agriculture -- no. 655; Technical bulletin (United States. Dept. of Agriculture) -- no. 655.
Publisher: U.S. Dept. of Agriculture
Published: 1938
Place of publication: Washington, D.C
Language: eng
Number of pages: 20
Subjects: Lettuce -- Seeds -- Viability; Germination
Notes: Caption title.

"December 1938."

Literature cited: p. 20.