Robert Koch /

• Main Author: Hallock, Grace T., 1893- (συγγραφέας)
• Other Authors: Turner, C. E. (Clair Elsmere), 1890-1974 (συγγραφέας)
• Format: Book
• Language: English
• Published: [χ.τ.] : [χ.ό.] , 1932.
• Series: Health heroes
• Subjects: Koch, Robert, > 1843-1910