平台:
ProQuest SciTech Premium Collection
(Available from 1969/01/01 until 1969/12/31. Available from 1971/01/01 until 1973/12/31. Available from 1975/01/01.)
ProQuest SciTech Premium Collection
(Available from 1969/01/01 until 1969/12/31. Available from 1971/01/01 until 1973/12/31. Available from 1975/01/01.)