book section published in 1977
book section published in 1973
book section published in 1976
book section published in 1976
book section published in 1977
book section published in 1976
book section published in 1974
book published in 1977
book section published in 1976
book section published in 1978
journal article from 'NASA Special Publication' published in 1977
book section published in 1974
book section published in 1973
book published in 1974
book section published in 1976
book section published in 1975
book section published in 1978
book section published in 1978
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