KNIGHT, Harry H. An investigation of the scarring of fruit caused by apple redbugs. 1918.

KNIGHT, Harry H.  An investigation of the scarring of fruit caused by apple redbugs.  Ithaca, New York, Cornell University, Agricultural Experiment Station, 1918.  4to. mayor; 22 pp., con 36 fotografías entre el texto.  Cubiertas originales.

• Agricultura
• Ussiana
• Americana