Arenal C., Rodolfo del. <br/><br/>
Mexican national report on scientific hydrology presented t-o the XIV th general assembly of the international union of- geodesy and geophysics, Berne, Sept. 26-oct. 7, 1967 / Rod-olfo del Arenal C. 

 - México : UNAM, Instituto de Geofisica 
 - [14] p. 
<br/><br/> "Reprint of the Anales del Instituto de Geofisica, UNAM, Vo-l. 12, pp. 43-58, 2 figs. 2 pls.".