File:PSM V66 D020 Session on the methodology of science at the st louis congress.png
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![File:PSM V66 D020 Session on the methodology of science at the st louis congress.png](https://upload.wikimedia.org/wikipedia/commons/thumb/0/03/PSM_V66_D020_Session_on_the_methodology_of_science_at_the_st_louis_congress.png/800px-PSM_V66_D020_Session_on_the_methodology_of_science_at_the_st_louis_congress.png?20111001041633)
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