Warszawa: Radiowy Instytut Wydawniczy 1949. 119,  pages. 6 x 8 1/2 inches. Decorative printed paper wrappers (artist signed in the image) with flaps integral to the covers. Previous owners' stamp on first page. Stamp opposite title page. Illustrated, some pages folding. Volume 2 of this work. Some minor soiling and spotting to the covers. Very Good. Wraps. 
Volume two of this work, both published in the same year. Text in Polish. Google translation: "Radio: from the microphone to the transmitting station and the receiver. Vol. 2"