Operating Instructions Type 1521-B Graphic Level Recorder

Operating Instructions Type 1521-B Graphic Level Recorder written & published by General Radio Co, West Concord, MA, 1964. 1st Edition. Paperback. Size 4to. Condition: Good. Liquid stain throughout book, top spine edge approximately 2'' X 2'' overall content OK, pull out schematic top edge chipped. Manual illustrated with drawings and black and white photographs. 40 Pgs. Description text copyright 2007 www.BooksForComfort.com. Item ID 15535.