31 May: Remembering Julius Richard Petri on Birthday
Julius Richard Petri (31 May 1852 – 20 December 1921) was a…
20 December: Tribute to Julius Richard Petri
Julius Richard Petri (31 May 1852 – 20 December 1921) was a…
Julius Richard Petri (31 May 1852 – 20 December 1921) was a…
Julius Richard Petri (31 May 1852 – 20 December 1921) was a…
