By Admin In IEC 2023-03-21 0 IEC 61951-1 Amd. 1 Ed. 4.0 b:2023 Click here to purchase Product Details Published: 02/01/2023 ISBN(s): 9782832263549 Number of Pages: 16 File Size: 1 file , 630 KB Note: This product is unavailable in Ukraine, Russia, Belarus