Larval instars of the Douglas-fir tussock moth
Beckwith, R.C.
Larval instars of the Douglas-fir tussock moth - Washington 1978 - 15 p. - No. 536; United States Departm .
Larval instars of the Douglas-fir tussock moth - Washington 1978 - 15 p. - No. 536; United States Departm .