2 1970s Radio Operator Course Books Amateur Commercial Communications Nonfiction

2 vintage radio operator books Both by Martin Schwartz Both published by AMECO Publishing Corp Both softcover with line illustrations Please read Condition sections below Please view all photos No returns 1) Commercial Radio Operator Theory Course 1975 edition 448 pages Good pre-owned condition A few pages have underlining Wear to spine and covers Some pages are dogeared Overall yellowing/aging 2) Amateur Radio Theory Course 1977 edition 320 pages Good pre-owned condition Some highlighting and writing Wear to covers and spine Some aging 2 lbs 7 oz