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[The history of sleep research in the 20th century].

Praxis, 1996
Not until the 19th century theories on sleep were based upon experimental findings in animal and humans. The so-called 'hypnotoxin theory' culminated, when Legendre and Piéron successfully induced sleep in a dog by transmission of cerebrospinal fluid from a dog deprived of sleep.
openaire   +1 more source

The Impacts of Different Sorts of Art Education on Pupils’ Preference for 20th-Century Art Movements

Education Sciences, 2020
Marija Brajčić   +2 more
exaly  

LANDSCAPE AND CLIMATE CHANGE IN THE CENTRAL CANADIAN ROCKIES DURING THE 20TH CENTURY

Canadian Geographer / Le Géographe canadien, 1998
Brian H Luckman
exaly  

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