Coba jelasin Rujukan dari Robert Koch dalam bahasa melayu dong

Robert Koch Biography at the Nobel Foundation website

MPIWG-Berlin, Robert Koch Biography and bibliography in the Virtual Laboratory of the Max Planck Institute for the History of Science

Musoptin.com, original microscope out of the laboratory Robert Koch used in Wollstein (1877)

Musoptin.com , microscope objectives: as they were used by Robert Koch for his first photos of microorganisms (1877–1878)