Hyperbolic equations and waves :  Battelle Seattle, 1968, Recontres / 
edited by M. Froissart. 
 - Berlin :  Springer-Verlag,  1970. 
 - 393 p. :  ill. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Waves--Congresses<br/>Differential equations, Hyperbolic--Congresses