Various files in this package have different copyrights. The DFB read/write facilities are based on code originally written by Nicholas Lewin-Koh and modified by Roger Bivand and Brian Ripley. R/dbf.R src/Rdbfread.c src/Rdbfwrite.c Copyright 2000-2001 (c) Nicholas Lewin-Koh Changes for the foreign package (C) 2004-7 R Core Team src/dbfopen.c src/shapefil.h Corrected versions of files from shapelib by Frank Warmerdam. The original files were (c) 1999, Frank Warmerdam. His code is available under the MIT or LGPL licence, and the latter is chosen here. man/read.dbf.Rd man/write.dbf.Rd Nicholas Lewin-Koh and Roger Bivand, Changes for the foreign package (C) 2004 R Core Team R/R_systat.R man/read.systat.Rd Copyright 2004 by Roger Bivand Changes for the foreign package (C) 2004 R Core Team src/R_systat.c Copyright (C) 1990-1992, 2004 Roger Bivand Patches (C) 2004 B. D. Ripley src/avl.c src/avl.h Copyright (C) 1998-9, 2000 Free Software Foundation, Inc. Written by Ben Pfaff (for libAVL: then , now ) Modified for R foreign package by Saikat DebRoy . The following files are based on an early version of PSPP (then , now ). src/file-handle.c src/file-handle.h src/format.c src/format.h src/pfm-read.c src/pfm-h src/sfm-read.c src/sfm.h src/sfmP.h Copyright (C) 1997-9, 2000 Free Software Foundation, Inc. Written by Ben Pfaff . Modified for R foreign package by Saikat DebRoy and others. src/minitab.c src/SASxport.c Copyright 1999 Douglas M. Bates , Saikat DebRoy src/foreign.h src/spss.c Copyright 2000 Saikat DebRoy Thomas Lumley src/stataread.c (c) 1999, 2000, 2001, 2002 Thomas Lumley. 2000 Saikat DebRoy Patches by the R Core Team and Brian Quistorff. man/read.dta.Rd man/write.dta.Rd man/write.foreign.Rd Thomas Lumley (Patches by the R Core Team) man/read.mtp.Rd Douglas M. Bates man/read.S.Rd Duncan Murdoch man/read.spss.Rd man/read.xport.Rd Saikat DebRoy R/read.ssd.R man/read.ssd.Rd (c) 2002 VJ Carey (c) 2002-7 R Core Team man/read.systat.Rd Roger Bivand R/read.epiinfo.R (c) 2002-4 Thomas Lumley Patches (c) 2002 Mark Myatt src/minitab.c Patches (c) 2004 Rajarshi Guha R/octave.R man/read.octave.Rd (c) 2004 Stephen Eglen Enhancements (c) 2004-7 R Core Team R/writeForeignSAS.R (c) 2004-5 R Core Team Enhancements (c) 2006 Stephen Weigand