Philips research reports :  A scientific journal of theoretical and experimental research in physics,chemistry and allied fields. 

 - Eindhoven :  Philips,  1950. 
 - v. :  fotos.,tbls.,gráficos ;  23 cm. 
<br/><br/>V.5 N.3 June 1950. V.5 N.6 December 1950.