4.39 Primary and Secondary Sources in History
0%
Skill Level🔴 Hard
00:00
Progress to Next Level25% to Medium
EasyMediumHardMastery100%
Passage
A researcher studies the 1906 San Francisco earthquake. She finds a set of 1906 photographs, a 1907 city rebuilding plan, and a 2016 article explaining the earthquake's long-term effects.