Marr, V.G. 1949 Versuche über Sommerbekämpfung der San José-Schildlaus. [Trials of summer control of the San José scale.]. Hofchen-Briefe 2(1): 18-25.
Notes: Detailed evaluation of a study of chemical control.
Marr, V.G. 1949 Versuche über Sommerbekämpfung der San José-Schildlaus. [Trials of summer control of the San José scale.]. Hofchen-Briefe 2(1): 18-25.
Notes: Detailed evaluation of a study of chemical control.