Published by the School of Mathematical Sciences, Queen Mary, University of London, London E1 4NS, U.K.

Founding editor: K. W. Gruenberg

Current editor: P. J. Cameron

P. M. Cohn | Morita Equivalence and Duality |
£5 |

P. Hall | The Edmonton Notes on Nilpotent Groups |
£5 |

R. Bieri | Homological Dimension of Discrete Groups |
£5 |

B. A. F. Wehrfritz | Lectures around Complete Local Rings |
£5 |

P. J. Cameron | Projective and Polar Spaces |
£5 |

E. D. Rabinovich | Definability of a Field in SufficientlyRich Incidence Systems |
£6 |

C. D. Murray and D. Harper |
Expansion of the Planetary DisturbingFunction to Eighth Order in the Individual Orbital Elements |
£13 |

C. D. Murray and O. C. Winter |
Atlas of the planar, circular, restrictedthree-body problem. I: Internal Orbits |
£13 |

C. D. Murray and O. C. Winter |
Atlas of the planar, circular, restrictedthree-body problem. II: External Orbits |
£13 |

S. McKay | Finite p-groups |
£7 |

**Postage and Packing:** Murray & Harper, Murray & Winter
£1.50 (in U.K.), £3 (other countries);
other volumes £1 (in U.K.), £2 (other countries).
Orders must be prepaid. Please send orders to the above address.

**Special offer:** 20% discount on orders of four or more volumes.

Peter J. Cameron

13 December 2000