Brecher, Kenneth and Setti, Giancarlo. High Energy
      Astrophysics and its relation to Elementary Particle
      Physics. Cambridge, Massachusetts: MIT Press,
      1974. Pages 187-189 describe the steady-state
      universe and the missing 95% of the universe's mass.

Collins, P.D.B., Martin, A.D., and Squires, E.J. Particle
      Physics and Cosmology. New York: John Wiley &
      Sons, Inc., 1989. The gauge forces are discussed on
      pages 3-4. Pages 389-395 discuss "dark matter" and
      the missing mass problem, and on page 391, "It is
      thus possible that neutrinos provide the bulk of the
      mass of the universe." Table 15.4 on page 392 lists
      other candidate particles. Pages 458-464: supernovae
      produce large quantities of neutrinos, and because
      they penetrate matter, monitoring neutrinos may be
      the best way to detect supernovae.

Rees, Martin, Ruffini, Remo, and Wheeler, John
      Archibald. An Introduction to Current Research. New
      York: Gordon and Breach Science Publishers, 1974.
      Page 249, the big bang theory predicts a sea of low
      energy neutrinos, presently undetectable.

Rogers, N.L. Structural Adhesives Bonding. New York:
      Interscience Publishers, 1966. On page 328 it
      describes the difference between the two types of
      bonding: mechanical and molecular.

Salam, Abdus. Unification of Fundamental Forces. New
      York: Cambridge University Press, 1990. This leading
      expert on gauge forces describes electromagnetism as
      "the change of momentum between the proton and
      the electron" on pages 40-41.

Schwarz, Cindy. A Tour of the Subatomic Zoo. New
      York: American Institute of Physics, 1992. Page 8
      has a good explanation of the Conservation Laws, and
      page 9 covers the Law of Momentum Conservation.
      Three of the four Field Forces are briefly defined on
      page 20.