Book stack png collage element, transparent background https://www.rawpixel.com/image/10183227/png-paper-booksView licenseScience education png, dog teacher collage, transparent background. Remixed by rawpixel. https://www.rawpixel.com/image/9591016/png-torn-paper-dog-aestheticView licensePetrus Apianus (1495-1552), also known as Peter Apian, was Professor of Mathematics at the University of Ingolstadt in… https://www.rawpixel.com/image/9976458/image-art-vintage-bookFree Image from public domain licenseTeacher avatar png sticker, transparent background https://www.rawpixel.com/image/7692826/png-sticker-bookView licenseGeological map of Italy, by H. de Collegno, professor of geology at the university of Bordeaux. https://www.rawpixel.com/image/7666281/image-art-vintage-public-domainFree Image from public domain licenseScientist png sticker education illustration, transparent background. 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