- Many of the resources we describe are, in reality, surrogates for something else
- a photograph of King Tutankhamen’sdeath mask
- a photograph of a statue of George Washington
- a film of President Kennedy’s assassination
- a sound recording of Neil Armstrong’s “Onesmall step for man…” speech on the moon
- a copy of the Mona Lisa
- a model of the Great Wall of China
- a reproduction of the Terracotta warriors.