Assertion: matrix vesicle | /r/CapableOf | use electron microscopy
Facets:
Source sentences:
text: Using electron microscopy they were discovered independently in 1967 by H. Clarke Anderson and Ermanno Bonucci.
text: Using electron microscopy but working independently, they were discovered in 1967 by H. Clarke Anderson and Ermanno Bonucci.
text: Using electron microscopy they were discovered independently in 1967 by H. Clarke Anderson and Ermanno Bonucci.