TY - BOOK AU - Silberstein L. TI - Projective Vector Algebra: An Algebra of Vectors Independent of The Axioms of Congruence and of Parallels U1 - 512.894 SIL PY - 1919/// CY - London PB - G.Bell and Sons KW - Mathematics; The Associative Law; Sum of Collinear Vectors KW - The Associative Law KW - Vector Equations of Straights and of Planes ER -