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During 1980, Cliff Singer proposes pellet stream propulsion for an interstellar craft.

Sections below

1. Web Resources

2. Book References

3. Other material

Web Resources

There is a rapid turnover of UFO material on the Internet. Many links to material on UFO websites quickly become out of date. Therefore, instead of giving many links to specific webpages I have instead focused on providing tables of references to discussion of UFO incidents, personalities and other matters in various books. Those tables of references to discussion in books can be sorted by author, length and date. I hope these tools are useful.

Book References

The table below includes references to relevant discussions in UFO/SETI books noted by Isaac Koi during a review of approximately 963 UFO/SETI books during the period 2003-2006 (with a few later additions). The table can be sorted by author, date and length of discussion by clicking on the relevant word in the top line of the table.

Many of the tables of references on this website are considerably longer than the references to books found on most other UFO websites. Indeed, some are probably the longest that have been collated in relation to some events and personalities. I hope that these tables are found to be a useful contribution to UFOlogy.

For discussion see the following:

Year	Discussion by:	No. of Pages
1982	Crawford, Ian A in “Extraterrestrials: Where are they?” (1982) (edited by Michael Hart and Ben Zuckerman) (available on Amazon USA and on Amazon UK) at page 60 (in Chapter 8) of the Cambridge softcover second edition. The relevant chapter is a revised and abridged version of an article published under the title “Interstellar Travel: A Review for Astronomers” in Quarterly Journal of the Royal Astronomical Society, Volume 31 (1990) at pages 377-400. The text of that article is available free online at: http://www.star.ucl.ac.uk/~iac/isflight/isflight.html	1
1982	Dyson, Freeman in “Extraterrestrials: Where are they?” (1982) (edited by Michael Hart and Ben Zuckerman) (available on Amazon USA and on Amazon UK) at pages 45-46 (in Chapter 7) of the Cambridge softcover second edition.	2
1989	Mallove, Eugene F and Matloff, Gregory L in their “The Starflight Handbook” (1989) (available on Amazon USA and on Amazon UK) at pages 145-146 (in Chapter 9) of the Wiley hardback edition.	2
1980	Rood, Robert and Trefil, James in their “Are We Alone?“ (1980) (available on Amazon USA and on Amazon UK) at pages 214-215 (in Chapter 14) of the Scribners hardback edition.	2
1982	Singer, Cliff in “Extraterrestrials: Where are they?” (1982) (edited by Michael Hart and Ben Zuckerman) (available on Amazon USA and on Amazon UK) at pages 76-79, 82-83 (in Chapter 9) of the Cambridge softcover second edition.	6

Other Material

Singer, C E (1980). “Interstellar propulsion using a pellet stream for momentum transfer.” Journal of British Interplanetary Society, Volume 33 (1980), pages 107-115.

Please use the comments section below to share references to any particularly interesting relevant articles.