Columbia subject headings:
Chemical workers--Diseases--Pennsylvania--Bridesburg.
Chemical workers--Health and hygiene--Pennsylvania--Bridesburg.
Dichloromethyl ether--Physiological effect.
Lungs--Cancer--Pennsylvania--Bridesburg.
Rohm and Haas Company.
Harvard subject headings:
Princeton subject headings:
Chemical workers--Diseases--Pennsylvania--Bridesburg.
Dichloromethyl ether--Physiological effect.
Lungs--Cancer--Pennsylvania--Bridesburg.
Rohm and Haas Company.