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…
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