  The groups of link bordism can be identified with homotopy groups via the
Pontryagin-Thom construction. B.J. Sanderson computed the bordism group of 3
component surface-links using the Hilton-Milnor Theorem, and later gave a
geometric interpretation of the groups in terms of intersections of Seifert
hypersurfaces and their framings. In this paper, we geometrically represent
every element of the bordism group uniquely by a certain standard form of a
surface-link, a generalization of a Hopf link. The standard forms give rise to
an inverse of Sanderson's geometrically defined invariant.
