Robert Koch,
by Grace T. Hallock ... and C.E. Turner ...
APA Citation
Hallock, G. T. (Grace Taber)., Turner, C. E. (Clair Elsmere). (1932). Robert Koch. [New York]: [Metropolitan life insurance Company].
MLA Citation
Hallock, Grace T. (Grace Taber), 1893-1967, and C. E. (Clair Elsmere) Turner. Robert Koch. [New York]: [Metropolitan life insurance Company], 1932.
Warning: These citations may not always be complete (especially for serials).