His Accountant's handbook of formulas and tables, c1988: CIP t.p. (Lawrence Lipkin; prof. of math., emeritus, Univ. of Ill., Chicago)

LC data base, 6-6-88 (hdg.: Lipkin, Lawrence)

Biblioteca del congreso (Estados Unidos), 18 enero 2019: catálogo electrónico https://goo.gl/VBUJ4r