Donder, Th. de b. 1872- Théorie des invariants integraux/ par Th. de Donder. - Paris: Gauthier-Villars, 1927. - vi, 128 pages; 25 cm Includes bibliographical references (pages 121-126). Subjects--Topical Terms: Invariants. Dewey Class. No.: 512.88 / D679t