In this offering, I shall call attention to a remarkable leap of imagination by pediatrician Clemens Freiherr (Baron) von Pirquet. In 1903, based upon purely clinical observations, the 29-year-old ...

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49 x 39 cm. (19.3 x 15.4 in.) ...

16.5 x 13.5 cm. (6.5 x 5.3 in.) ...

Richthofen, Ferdinand, Freiherr von, 1833-1905 Publication date 1898 Topics Shandong Sheng (China), Qingdao (China) Publisher Berlin D. Reimer Collection robarts; toronto; university_of_toronto ...