Bell, J., Darvis, D., Hartmann, W., and Gaffey, M.  1989.  "Asteroids: The Big Picture".  In Asteroids II, ed. R. Binzel,
          T. Gehrels, M. Matthews (Tuscon: University of Arizona Press), pp 921-945.

Binzel, R.  1989.  "An Overview of the Asteroids".  In Asteroids II, ed. R. Binzel, T. Gehrels, M. Matthews (Tuscon:
            University of Arizona Press), pp 3-18.

Chapman, C. R., Paolicchi, P. Zapalla, V., Binzel, R. and Bell, J.  1989.  "Asteroid Families: Physical Properties and
          Evolution".  In Asteroids II, ed. R. Binzel, T. Gehrels, M. Matthews (Tuscon: University of Arizona Press),
          pp 386-415.

Cole, Dandridge M.; and Cox, Donald W.  Islands in Space:  The Challenge of the Planetoids.  Chilton
          Books:  Philedlphia and New York, 1964.

Kowal, Charles T.  Asteroids:  Thier Nature and Utilization, Second Edition.  Praxis Publishing:
          Chinester, 1996.

McFadden, L., Tholen, D., and Veeder, G.  1989.  "Physical Properties of Aten, Apollo, and Amor Asteroids".
            In Asteroids II, ed. R. Binzel, T. Gehrels, M. Matthews (Tuscon: University of Arizona Press), pp 442-467.

Roth, Gunter D.  The System of Minor Planets.  D. Van Nostrand Company:  Princeton, New Jersey,
          1962.

Wehterill, G. W.  1989.  "Origin of the Asteroid Belt".  In Asteroids II, ed. R. Binzel, T. Gehrels, M. Matthews (Tuscon:
            University of Arizona Press), pp 661-680.
 

Space Mining:
Kargel, Jeffery S.  "Digging for Gold."  Astronomy.  Dec. 1997:   p48-53.

Lewis, John S.  Mining the Sky.  Addison-Wesely Publishing Company:  Reading, Massachusetts, 1996.

Lewis, John S.  Rain of Iron and Ice.  Addison-Wesely Publishing Company:  Reading, Massachusetts,
            1996.

Lewis, John S. and Ruth A. Lewis.  Space Resources:  Breaking the Bonds of Earth.  Coloumbia
            University Press:  New York, 1987.
 

Space Law and Ethics:
Christol, Carl Q.  The Modern International Law of Outer Space.  Pergamon Press:  New York, 1982.

Fawcett, J.E.S.  Outer Space:  New Challenges to Law and Policy.  Clarendon Press:  Oxford, 1984.

Gal, Gyula.  Space Law.  Oceana Publications:  New York, 1969.

Hargrove, Eugene C.  Beyond Spaceship Earth:  Evironmental Ethics and the Solar System.  Sierra
            Club Books: San Fransisco, 1986.

Hartmann, William K.  1984.  "Space Exploration and Environmental Issues".  In Beyond Spaceship Earth:
            Environmental Ethics and the Solar System, ed. Hargrove, Eugene C. (San Fransisco:  Sierra Club
            Books),  pp 119-139.

Jessup, Phillip Caryl and Howard J. Taubenfeld.  Controls for Outer Space.  Columbia University:  New
            York, 1959.

Kanipe, Jeff.  "Red Asteroids May Carry Stuff of Life".  Science.  June 1997, p 17.

Rolston, Holmes III.  1986.  "The Preservation of Natural Value in the Solar System".  In Beyond Spaceship
            Earth:  Evironmental Ethics and the Solar System ed. Hargrove, Eugene C. (San Fransisco:  Sierra
            Club Books),  pp 140-182.

White, Irvin L  Clifton E Wilson and John A. Vosburgh.  Law and Politics in Outer Space.  The
            University of  Arizona Press:  Tuscon Arizona, 1972.
 

Impacts:
Ahrendt, Myrl H.  Mathematics of Space Exploration.  Holt, Rinehart and Winston, Inc., New York, 1965.

Lewis, John S.  Rain of Iron and Ice.  Addison-Wesely Publishing Company:  Reading, Massachusetts,
            1996.

Verschuur, Gerrit L.  "Impact Hazards: Truth and Consequences."  Sky & Telescope.   June 1998:  Vol. 95
            No. 6, p 26-34.