Which are secondary sources? Select three options. documentary about the Great Depression textbook chapter about economic markets book of historical fiction written about Dust Bowl refugees letter home written by someone during the Great Depression Osigned federal law aiding people affected by the Great Depression

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aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on

answer; (b) asia;