'Rachel Brown & Elizabeth Hazen invented nystatin, an anitbiotic used on people & on this "Dutch" tree disease'
Dutch elm disease
SHE INVENTED WHAT?: Rachel Brown & Elizabeth Hazen invented nystatin, an anitbiotic used on people & on this Dutch tree disease
Rachel Brown & Elizabeth Hazen invented nystatin, an anitbiotic used on people & on this "Dutch" tree disease
Rachel Brown & Elizabeth Hazen invented nystatin, an anitbiotic used on people & on this "Dutch" tree disease
SHE INVENTED WHAT?
Dutch elm disease
SHE INVENTED WHAT?