Examples of primary source

newspaper reports, by reporters who witnessed an event or who quote people who did, anyone or anything who was there and saw it first hand.

for ex: a diary entry of someone who witnessed an important event

Any firsthand documentation.

Explanation:

it's lower nubia : ) good luck

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.