The survey package has benefited from code, bug reports, and feature 
requests from users, including:
  Daniel Almirall
  Guiseppe Antonaci
  Norman Breslow
  Stefano Calza
  Ben French
  Jacques Ferrez
  Daniella Gollinelli
  Alistair Gray
  Lucia Hindorff
  Lisa McShane
  Ana Patricia Martins
  Daryl Morris
  Ana Quiterio
  Gillian Raab
  Brian Ripley
  Fred Rohde
  Steve Roberts
  Andrew Robinson
  Lee Sieswerda
  Phil Smith
  Takahiro Tsuchiya
  Richard Valliant
  Tobias Verbeke
  Renzo Vettori
  Diego Zardetto
  Alan Zaslavksy
and from dicussions with Chris Wild and Alastair Scott. 

Some work on the package has been funded by Fondation Leducq through a
grant to the LINAT collaboration and by the Marsden Fund through a
grant to the University of Auckland.

Patrick Aboyoun did the S-PLUS port of version 3.6-8

The svyolr() code is largely ripped from the MASS package of Venables & Ripley.

