Dyfyniad APA

Tovell, R. M., & Friend, A. W. (1942). Control of Physical Hazards of Anæsthesia.

Dyfyniad Arddull Chicago

Tovell, Ralph M., and A. W. Friend. Control of Physical Hazards of Anæsthesia. 1942.

Dyfyniad MLA

Tovell, Ralph M., and A. W. Friend. Control of Physical Hazards of Anæsthesia. 1942.

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