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Delta (letter) - Wikipedia
Delta Symbol in Greek Alphabet Δ δ
Delta Decoded: The Symbol of Change - Greek Alphabet
Greek alphabet letters & symbols with pronunciation - RapidTables.com
How to Write the Greek Alphabet: 4 Steps (with Pictures ... - wikiHow
Delta - Simple English Wikipedia, the free encyclopedia
The Greek Letters/Symbols and Their Meanings - Mythologian
δ - Wiktionary, the free dictionary
Delta Letter/Sign In Greek Alphabet And Math - Mythologian
Greek alphabet letters & symbols with pronunciation - MaxTables