Scientific American (New York : Scientific American Inc., 1859)
v.234, no.1-6(Jan-June,1976) -v.235, no.1-6(July Dec,1976) - v.236, no.1-6(jan-June,1977) - v.237, no.1-6(Jul-Dec,1977) - v.238,no.1-6(Jan-June)1978 - v.239,no.1-6(July-Dec)1978