Hergenrüder, A. <br/><br/>
Recent findings in the testing of models / A. Hergenrüder a-nd H. Rüsch 

 - Amsterdam, [Holanda] : North Holland 
 - [15] p. 
<br/><br/> [Reprinted from:] "Proceedings of the Symposium on Shell Re-search, Delft, August 30 - September 2, 1961".