Van Tubergen 1915; De Graaf 1921; Barr 1927; 1928; Van't Hof and Blokker 1927; Tegelaar Bros. 1927; Van Waveren 1928; 1935; 1938; Bulbous Trials 1933;
Award of Merit Royal Horticultural Society 1931; Yaerbook the Iris Society of England 91; 1931;
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