The image of planet Earth at the top was cut from Life magazine (Sept 1955). The original reference image for the collage from Life magazine supplied to Hamilton is in the John McHale archives at Yale University.
The photograph of Earth featured on the cover of Life magazine (September 1955) was used by Hamilton. The original picture that served as the basis for this collage, which he received from Life magazine, can be found in the John McHale archive at Yale University.