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- DescriptionCeline Swarts Baekeland.jpg English: NMAH Archives Center Leo H. Baekeland Papers, 1863-1968 0005 Series 10: Photographic Images Box 52 "Celine Swarts...(493 × 800 (85 KB)) - 06:28, 16 February 2024
- President Coolidge 1627 1644 44 44 4096 3298 Leo Hendrik Baekeland 1199 1611 44 44 4096 3298 Céline Swarts English Dutch President Coolidge met de leden van...(4,096 × 3,298 (1.56 MB)) - 13:13, 8 December 2023
- op 24 april 1924. Naast hem staat Leo Hendrik Baekeland en mevrouw Baekeland Céline Swarts. Baekeland was in 1924 de voorzitter van A.C.S.. determination...(5,943 × 4,250 (3.55 MB)) - 20:26, 13 April 2024
- File:Coolidge & Am. Chemical Society, 4-24-24 LCCN2016848983.tif (category LC TIF images with categorized JPGs)op 24 april 1924. Naast hem staat Leo Hendrik Baekeland en mevrouw Baekeland Céline Swarts. Baekeland was in 1924 de voorzitter van A.C.S.. determination...(5,943 × 4,250 (24.09 MB)) - 20:26, 13 April 2024
- File:President Coolidge standing with members of the American Chemical Society on the White House lawn; visible in the background is the White House, scaffolded for repairs LCCN94511951.tif (category LC TIF images with categorized JPGs)op 24 april 1924. Naast hem staat Leo Hendrik Baekeland en mevrouw Baekeland Céline Swarts. Baekeland was in 1924 de voorzitter van A.C.S.. determination...(4,096 × 3,298 (12.88 MB)) - 02:02, 11 August 2024