The Great Plains conservation program
Subtitle: A progress report. Slightly rev. Sept. 1969
Series: United States Dept. of Agriculture. PA 669; Program aid (United States. Department of Agriculture) -- 669.
Publisher: U.S. Govt. Print. Off.
Published: 1969
Place of publication: Washington
Language: eng
Number of pages: 16
Subjects: Fertilizers; Soil science
Notes: Issued Nov. 1965