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This must have been taken at Langsa around 1921. 2nd on the right, Willem Marius van der Veer. In the middle, Henriette Louise Jansz van der Veer. 1st left, (Wim) Willem van der Veer. 2nd left, Bob van der Veer. 4th left, (Bert) Hereendert Berand van der Veer, father of Mariette van der Veer. Next to Bert, Maria van der Veer, the mother of Marianne van der Veer Ouwehand.
Who the others are? They must have been friends and/or people working on the rubber estate.