Amazon.com: Phoncoo BC547+ BC557 Each 100pcs All 200pcs Bag BC547B BC557B NPN PNP Transistor TO-92 Power Triode Transistor Bag : Industrial & Scientific
Crystal Fire: The Invention of the Transistor and the Birth of the Information Age (Sloan Technology Series): Riordan, Michael, Hoddeson, Lillian: 9780393318517: Amazon.com: Books