[Text and another illustration on p. 2 and 4 of cover. Reproduced by Soil Conservation Service with permission of director, Resource-Use Education, Alabama Polytechnic Institute, Auburn, Ala., Jan. 1951.]
Notes:
[Text and another illustration on p. 2 and 4 of cover. Reproduced by Soil Conservation Service with permission of director, Resource-Use Education, Alabama Polytechnic Institute, Auburn, Ala., Jan. 1951.] * For Sale by Superintendent of Documents. Paper 20c.
Availability:
* For Sale by Superintendent of Documents. Paper 20c.