C. A. Johansen

• How to reduce bee poisoning from pesticides
• Die Gastrostomie bei carcinomatoeser Strictur des Oesophagus
• Adjuvants decrease insecticide hazard to honey bees
• Alfalfa weevil and clover leaf weevil
• Bear protection for bees
• Beekeeping
• Beneficial predators and parasites found on Washington crops
• Biology and management of the alkali bee, Nomia melanderi, Cockerell (Hymenoptera, Halictidae)
• Brazilian bee
• Control of alfalfa leafcutting bee enemies
• Die Gastrostomie bei carcinomatoeser Strictur des Oosophagus
• Ecology of three species of bumble bees in southwestern Washington