([FS-32]; Conservation teaching aid.) [Prepared in cooperation with Soil Conservation Service. Combines and supersedes D-4, How tree grows, and D-8, Tree and Soil.]
Notes:
([FS-32]; Conservation teaching aid.) [Prepared in cooperation with Soil Conservation Service. Combines and supersedes D-4, How tree grows, and D-8, Tree and Soil.] * For Sale by Superintendent of Documents. Paper, 10c. • Sent to Depository Libraries. Item 81-A
Availability:
* For Sale by Superintendent of Documents. Paper, 10c. • Sent to Depository Libraries. Item 81-A