I. Bergis

A CHRYSOMELID BEETLE DEFOLIATING BIG SAGEBRUSH IN SOUTH-CENTRAL BRITISH COLUMBIA

G. Rich, S. Halford, I. Bergis, 1973 .

CAUSAL AGENTS OF SILVER TOP AND OTHER TYPES OF DAMAGE TO GRASS SEED CROPS

D. A. Arnott, I. Bergis, 1967, The Canadian Entomologist.