The Gerard Hengeveld reference article from the English Wikipedia on 24-Apr-2004
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Gerard Hengeveld

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Gerard Hengeveld (1910 - 2001) was a Dutch classical pianist, music composer and educationalist. He is especially known for his compositions of study material for piano. Other compositions include two piano concertos, a violin sonata, and a sonata for cello. Hengeveld was an able interpreter and performer of the music of Bach for piano and harpsichord. He gave regular concerts in the Concertgebouw in Amsterdam. Some of his concerts were captured on record.

Gerard Hengeveld died on Sunday, October 28, 2001 in Bergen, the Netherlands. He was 90 years old.