1 results containing "Soil conservation--1930-1940."
Plains farms need trees Trees prevent wind erosion, save moisture ... protect crops, contribute to human comfort and happiness /
[between 1936 and 1940] | 1 print on board (poster) | Dusek, Joseph
POS - WPA - ILL .D87, no. 3 (C size) [P&P] | LC-USZC2-815 (color film copy slide)