Calendar: 1968-1969 Page 458

cxvi Annual Report of the Delegacy Warrington 'Correlation of the Keuper Series of the Trassic by Miospores Nature 214 5095 1967 1323-40 DEPARTMENT OF MATHEMATICS Allan and Bullard 'The secular variation of the earth's magnetic field Proc Camb Phil Soc 62 1966 783-809 Allan Thompson and Weiss 'Convection in the earth's mantle Mantles of the Earth and Terrestrial Planets Runcorn et al Wiley 1967 Burgoyne 'Practical LP polynomial approximation Mathematics of Computation 21 1967 113 Cantoni Ά class of representations of the generalized Bondi-Metztier group Math Phys 1966 1362-4 Erdos 'Some results on triangular operator algebras Amer Math 89 1967 85-93 'On product of idempotent matrices Glasgow Math July 1967 118-22 Review in Quarterly of App Maths Foster and Newman Ε 'Note on the Robinson-Trautman solutions Math Phys 1967 184-94 Frohlich Α and Cassels joint editors 'Algebraic number theory Proceedings of the international conference Brighton 1965 Academic Press 1967 Frohlich 'Resolvents discriminants and trace invariants of Algebra 1966 173-98 Some topics in the theory of module conductors Miath Forschungs Institut Oberwolfach Berichte 1966 59-82 'Radical modules over Dedekind domain Nagoya Math 27 1966 643-62 'Local fields Algebraic Number Theory Academic Press 3967 Frohlich Α and Armitage 'Class numbers and unit signatures Mathematika 14 1967 94-8 Higgins 'Grushko's theorem of Algebra 1966 365-72 Reviews in Mathematical Reviews