The terrapin scale /
Symons, B
The terrapin scale / B. Symons, and E. N. Cory - College Park : Maryland Agricultural College - p. 83-92 - Maryland Agr.Exp. Sta. Bull; 149 .
203440
Lecanium
The terrapin scale / B. Symons, and E. N. Cory - College Park : Maryland Agricultural College - p. 83-92 - Maryland Agr.Exp. Sta. Bull; 149 .
203440
Lecanium
