[1188 pictures] Pictures by Hans Martens. You can freely use the pictures if you mention "Hans Martens Fotografie"
Holland Harmony Convention 2019: Quartet Contest -HANS
Featuring: The Emerald Guard, Angels and Demons, LinQ, New4, Men2B, Dutch Blend, O!Boy, Natural Blend, Around the Bar, Conundrum, Cross Connection, 4Sure!, Option4, Mrs. Jones, Cloud9, Fyra, Switch, QuartetQ, Next Generation, Stop Talking, Fruity Island Boys, Challenge, Unlimited, Scandal Quartet, Award Ceremony