Marvin, Robert S. <br/><br/>
Derivation of the Relaxation Spectrum Representation of the Mechanical Response Function 

 -  [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology,   1962. 
<br/><br/> /pmc/articles/PMC5312819/ 
<br/><br/> Relaxation spectra have been used in both the presentation and interpretation of measurements of the mechanical properties of rubberlike polymers. 
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