George Jacobs, W3ASK books & textbook
The CQ Shortwave Propagation Handbook 4th Edition
Carl Luetzelschwab, K9LA Theodore J. Cohen, N4XX George Jacobs, W3ASK Robert B. Rose, K6GKU (SK)
CQ Communications, Inc. /2021T Paperback / 208 Pages
isbn-10: 0943016622 / isbn-13: 9780943016627
