'At the Centennial Exposition in 1876, he was on call to introduce his new telephone'
Alexander Graham Bell
SCIENTISTS & INVENTORS: At the Centennial Exposition in 1876, he was on call to introduce his new telephone
At the Centennial Exposition in 1876, he was on call to introduce his new telephone
At the Centennial Exposition in 1876, he was on call to introduce his new telephone
SCIENTISTS & INVENTORS
Alexander Graham Bell
SCIENTISTS & INVENTORS