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objects are classified as to disjoint sets
Ce mobile donne à l'enfant quelque chose sur quoi se concentrer : le noir et blanc constitue un excellent contraste pour les nouveau-nés
un cocon où la transformation a lieu et un papillon qui s'envole
Sie bildet die Grundlage der vorliegenden wissenschaftlich fundierten Werkausgabe
Encoding of phonograms: Word Lists (2 types of words lists for a total of 54 word lists)
Maria Montessori Writes To Her Father (anglais) biol-3-6 objects are classified as toMaria Montessori traveled to America for the first time in 1913, a hugely successful visit leading to an even greater interest in her educational ideas. In the following year, her American supporters urged her to return to conduct training courses, which were in great demand. To celebrate the formidable technical achievement of constructing the Panama Canal, two simultaneous expositions had been organized: The Panama Pacific International Exposition
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