Spence, Lawrence E. (Nombre personal)

Friedberg, S. H. Linear algebra, c1979 (a.e.) t.p. (Lawrence E. Spence, U. of Ill.)

His Finite mathematics, c1981: t.p. (Lawrence E. Spence) CIP data sheet (b. 1/19/46)

Algebra lineal, 1982 : title page (Lawrence E. Spence)

VIAF, sitio web 31 enero 2024: (puntos de acceso: Spence, Lawrence E.) http://viaf.org/viaf/93540230/#Spence,_Lawrence_E.