י־ר־ד
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szerkesztés- “י־ר־ד” in the Hebrew Terms Database of the Academy of Hebrew Language
- “י־ר־ד”, in Hebrew dictionary and conjugation tables, Pealim.com
- Klein, Ernest (1987), “ירד”, in A Comprehensive Etymological Dictionary of the Hebrew Language for Readers of English[1], Jerusalem: Carta, ISBN 978-965220093-8, page 264(?)