- The Relativity Of Wrong, Oxford University Press, 1989 - The Relativity Of Wrong, Doubleday, 1988 - The Relativity Of Wrong, Windsor/Pinnacle Books, Feb-89 - The Relativity Of Wrong, Kensington Books, Jan-96 Lady Liberty (with Jake Rajs), Jul-86, Tin Stars
- Past, Present, And Future, Prometheus Books, 1987 Learning Device, Aug-79, Isaac Asimov's Science Fiction Magazine
- Asimov On Science Fiction, Avon/Discus, Apr-82 - Asimov On Science Fiction, Doubleday, 1981 - Asimov On Science Fiction, Doubleday, 1981 Let Einstein Be!, Dec-81, The Magazine of Fantasy and Science Fiction
- Counting The Eons, Avon/Discus, Mar-84 - Counting The Eons, Doubleday, 1983 Let Me Count the Days, Oct-81, The Magazine of Fantasy and Science Fiction
- Counting The Eons, Avon/Discus, Mar-84 - Counting The Eons, Doubleday, 1983 Let There Be a New Light, 1967, Boston University Graduate Journal
- Is Anyone There?, Ace, 1967 - Is Anyone There?, Doubleday, 1967 - Is Anyone There?, Ace, 1970 Letter to a Newborn Child, 1975 No 3, Fantastic Universe
- The Roving Mind, Prometheus Books, 1983 - The Roving Mind, Prometheus Books, 1983 Life, 1968 V14, Yearbook of Science and the Future (Enc Brit)
- Life And Time, Avon/Discus, Dec-79 - Life And Time, Doubleday, 1978 Life in 1990, Jan-65, New York Times Magazine
- Is Anyone There?, Ace, 1967 - Is Anyone There?, Doubleday, 1967 - Is Anyone There?, Ace, 1970 Life on a Space Settlement, Sep-80, Los Angeles Times
- The Roving Mind, Prometheus Books, 1983 - The Roving Mind, Prometheus Books, 1983 Life on Luna - Why Not?, May-75, Natural History
- The Roving Mind, Prometheus Books, 1983 - The Roving Mind, Prometheus Books, 1983 Life's Bottleneck, Apr-59, The Magazine of Fantasy and Science Fiction
- Asimov On Chemistry, Anchor, 1975 - Asimov On Chemistry, Anchor, 1975 - Asimov On Chemistry, Doubleday, 1974 - Fact And Fancy, Doubleday, 1962 - Fact And Fancy, Pyramid, 1963 - Fact And Fancy, Avon, Mar-72 Light as Air?, Mar-81, The Magazine of Fantasy and Science Fiction
- Counting The Eons, Avon/Discus, Mar-84 - Counting The Eons, Doubleday, 1983 Little Found Satellite, Oct-68, The Magazine of Fantasy and Science Fiction
- The Solar System And Back, Avon/Discus, May-72 - The Solar System And Back, Avon/Discus, May-72 - The Solar System And Back, Doubleday, 1970 Little Lost Satellite, Jul-68, The Magazine of Fantasy and Science Fiction
- The Solar System And Back, Avon/Discus, May-72 - The Solar System And Back, Avon/Discus, May-72 - The Solar System And Back, Doubleday, 1970 Long Ago and Far Away, Aug-89, The Magazine of Fantasy and Science Fiction
- The Secret Of The Universe, Doubleday, 1991 - The Secret Of The Universe, Pinnacle, Nov-92 Look Long upon a Monkey, Sep-74, The Magazine of Fantasy and Science Fiction
- Magic: The Final Fantasy Collection, Harper Prism, Jan-96 - Of Matters Great And Small, Doubleday, 1975 - Of Matters Great And Small, Ace, May-76 Losing the Debate, Mar-82 , SciQuest, the Magazine of the American Chemical Society
- The Roving Mind, Prometheus Books, 1983 - The Roving Mind, Prometheus Books, 1983 Lost in Non-Translation, Mar-72, The Magazine of Fantasy and Science Fiction
- Magic: The Final Fantasy Collection, Harper Prism, Jan-96 Love Makes the World Go Round, Mar-84, The Magazine of Fantasy and Science Fiction
- The Subatomic Monster, Doubleday, 1985 - The Subatomic Monster, NAL/Mentor, Nov-86
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