I had the opportunity to visit the St. Louis Public Library genealogy room and found the referenced material. Lillie (Klein) Euler and Bertha "Bertie" (Klein) Selzer are mentioned.
St. Louis Post-Dispatch, 17 Mar 1964 page 8C
Carl H Euler, Tuesday March 17 1964, beloved husband of Lillie C. Euler, dear father of Edwin J. Euler and the late Mildred Ebling, dear grandfather of Robert and Fred Ebling, our dear father-in-law, great-grandfather, brother-in-law, uncle, great-uncle, and great-great-uncle.
Service Thursday, 1:30 p.m. from JOHN L. ZIEGENHEIN & SONS, 7027 Gravois. Interment Valhalla. Member of Meridian Lodge No. 2 A.F. & A.M., and Electrical Workers Union Local No. 1 I.B.E.W. Masonic service Wed. 8 p.m.
St. Louis Post-Dispatch, 15 Oct 1967 page 3E
Lillie C. Euler, Tuesday Friday October 13, 1967, dear wife of the late Carl H. Euler, dear mother of Edwin J. Euler and the late Mildred Ebling, dear sister of Bertha Selzer, dear mother-in-law, grandmother, great-grandmother, sister-in-law, aunt, great-aunt and great-great-aunt.
Services Monday, 1 p.m. at JOHN L. ZIEGENHEIN & SONS, 7027 Gravois. Interment Valhalla. Member of Apollo Chapter No. 424, O.E.S.