TY - JOUR AU - Cordes, Craig M. AU - Jr., John R. Ramsey TI - Quadratic forms over Quadratic Extensions of Fields with Two Quaternion Algebras JO - Canadian journal of mathematics PY - 1979 SP - 1047 EP - 1058 VL - 31 IS - 5 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-096-x/ DO - 10.4153/CJM-1979-096-x ID - 10_4153_CJM_1979_096_x ER -