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Ratio And Proportion Juvenile Literature   9
  Ratiocination -- See Reasoning
  1
  Rational Use Of Energy -- See Energy conservation
Here are entered general works on the conservation of all forms of energy. Works on the conservation of energy as a physical concept are entered under Force and energy.

--subdivision Energy conservation under types of industries, facilities, etc., e.g. Construction industry--Energy conservation
  1
  Ratites -- See Also the narrower term Ostriches
  1
Ratites Juvenile Literature   2
  Ratovi Zvezda Motion Picture -- See Star wars (Motion picture)
  1
  Ratovi Zvijezda Motion Picture -- See Star wars (Motion picture)
  1
Rats Anatomy Juvenile Literature : Outside and inside rats and mice / by Sandra Markle.  c2001 1
Rats As Pets   2
Rats As Pets Juvenile Fiction   6
Rats As Pets Juvenile Literature   7
Rats As Pets Juvenile Sound Recordings : Malcolm at midnight [sound recording] / W. H. Beck.  p2012 1
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