electrical and mechanical engineering regulations Repeater, telephone, 2-circuit : General description electrical and mechanical engineering regulations Repeater, telephone, 2-circuit : First Echelon Work electrical and mechanical engineering regulations Wireless set No. 18 : Modification instructions index overdruk voordrachten no. 1, 1949, k.i. v. i Speurwerk, van luistertoestel tot radar / J.L. van Soest resultaten van 35 jaar ruimtevaart / met bijdragen van N. Bunnik ... [et al.] ; eindred.: Govert Schilling
