Improved Bates laboratory aspirator
By: by E.N. Bates
Series: Circular / United States Department of Agriculture -- no. 630; Circular (United States. Dept. of Agriculture) -- no. 630.
Publisher: U.S. Dept. of Agriculture
Published: 1942
Place of publication: Washington, D.C
Language: eng
Number of pages: 12
Subjects: Separators (Machines); Seed separators
Notes: Caption title.

"Supersedes Circular no. 9, The Bates laboratory aspirator."