00503nam a2200157Ia 4500003000900000008004100009040001600050080001600066100002100082245008300103260005900186300001000245490006100255650001000316650001900326IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a535.22bDOR  aDorsey, N Ernest 0aVelocity of lightcN Ernest Dorsey                                              aPhiladelphiabThe American Philosophical Societyc1944  a109p.  aTransaction of the American philosophical society; v. 33  aLight  aNASA Thesaurus