Hopp, V., & Hennig, I. (1983). Handbook of applied chemistry: Facts for engineers, scientists, technicians, and technical managers. Hemisphere Pub. Corp. ; McGraw-Hill.

Hopp, Vollrath, and Ingo Hennig. Handbook of Applied Chemistry: Facts for Engineers, Scientists, Technicians, and Technical Managers. Washington : New York: Hemisphere Pub. Corp. ; McGraw-Hill, 1983.

Hopp, Vollrath, and Ingo Hennig. Handbook of Applied Chemistry: Facts for Engineers, Scientists, Technicians, and Technical Managers. Hemisphere Pub. Corp. ; McGraw-Hill, 1983.