found: Anton L. Koster, 1859-1937 : schilder van bloembolenvelden, 2017:p. 120-121 (signed works A.L. Koster) p. 122 (Anton Louis Koster; b. Terneuzen, Aug. 8, 1859) p. 123 (d. Haarlem, May 28, 1937)
found: Beeldend Benelux : biografisch handboek, 2000(Koster, Antonie Louis; b. Terneuzen, Aug. 8, 1859; variant: Koster, Anthonie Louis (Lodewijk))
found: Union list of artist names, Dec. 6, 2017(Koster, Antonie Louis (Dutch painter, 1856-1937); variants: Koster, Antonie Lodewijk; Koster, Anton)
found: Lexicon Nederlandse beeldende kunstenaars 1750-1950, 1969-1970(Koster, Antonie Lodewijk (Anton L.); b. Terneuzen, Aug. 8, 1859; d. Haarlem, May 28, 1937)
found: National Library of the Netherlands in VIAF, Dec. 6, 2017(access point: Koster, A. L. (Antonie Louis), 1859-1937)
found: Allgemeines Künstlerlexikon. Bio-bibliographischer Index A-Z, 2007-2009(Koster, Lodewijk (Koster, Anton L.; Koster, Antonie Lodewijk; Koster, Antonie Louis); b. Terneuzen, Aug. 8, 1858; d. Heemstede, May 28 or 29, 1937; landscape painter, etcher, master draughtsman)
