TY  - BOOK
AU  - Essig, E. O. (Edward Oliver)
TI  - Control of the brown apricot scale and the Italian pear scale on deciduous fruit trees
PB  - University of California, College of Agriculture, Agricultural Experiment Station
PY  - 1920
T2  - Circular / College of Agriculture, Agricultural Experiment Station, University of California
VL  - no. 224
EP  - 11 p.
UR  - http://ci.nii.ac.jp/ncid/BB18253958
ER  -