Sugimoto, Yonco. <br/><br/>
Vibration tests and earthquake resistance observations for -a steel-framed telephone exchange building / Yonco Sugimoto- and Yukio Sawabe. 

 - [Tokio, Japón] : al Communication Laboratories 
 - [11] p. 
<br/><br/> "Reprinted from the Review of the Electrical Communication -Laboratories, vol. 23, nos. 3-4, march-april, 1975".