'These monkeys were important "factors" in the development of the Salk polio vaccine'
Rheseus Monkeys
MONKEY BUSINESS: These monkeys were important factors in the development of the Salk polio vaccine
These monkeys were important "factors" in the development of the Salk polio vaccine
These monkeys were important "factors" in the development of the Salk polio vaccine
MONKEY BUSINESS
Rheseus Monkeys
MONKEY BUSINESS