REFRENCES TO PUBLISHED PAPERS
                  -----------------------------


Program                   Reference
------                    ---------

ORIGTILT	Amos,L.A.,Henderson, and Unwin(1982) Prog.Biophys.Mol.Biol.
      					                         39, 183-231.
      		Henderson,R.,Baldwin,Downing,Lepault and Zemlin (1986)
      						Ultramicroscopy, 19, 147-178.
LATLINE		Agard,D,A. (1983) J.Mol.Biol. 167, 849-852

EMTILT		Shaw,P.J. and Hills,G.J. (1981) Micron 12, 279-282.

NIKSCN		Arndt,U.,Barrington-Leigh,Mallett and Twinn (1969) J.Phys.E.
      						Sci.Instrum. 2,385-387.
SPLINEFIT	Egelman,E. (1986) Ultramicroscopy 19, 367-374.

SURF		Vigers,G.P.A., Crowther,R.A. and Pearse,B.M.F. (1986)
LIGHT	                                        EMBO J. 5, 529-534.
                Vigers,G.P.A. (1986) PhD.Thesis Cambridge University.

QUADSERCHA	Henderson,R., Baldwin,Downing,Lepault and Zemlin (1986)
LATLINE						Ultramicroscopy 19, 147-178.
CCUNBENDC
CTFREFINE
CTFAPPLY

TTMASK		Henderson.R.,Baldwin,Ceska,Zemlin,Beckmann and Downing (1990)
TTBOX						J.Mol.Biol. 213, 899-929.
TTREFINE

BACKAUTO	Baldwin,J.M and Henderson,R.(1984) Ultramicroscopy,14,319-336.
AUTOINDEX
PICKAUTO
SYNCFIT

MERGEDIFF	Ceska,T.A. and Henderson,R.(1990) J.Mol.Biol. 213, 539-560.

HLXFOUR		DeRosier,D.J. and Moore,P.B.(1970) J.Mol.Biol. 52, 355-369.
HLXAVG
HLXSEARCH
HLXDUMP
HLXFIT

HLXSEPDAT	Crowther,R.A., Padron,R. and Craig,R. (1985) J.Mol.Biol.184,
HLXSEPR                                          429-439.

ICOSAHEDRAL     Crowther,R.A., DeRosier,D.J. and Klug,A. (1970) Proc.Roy.
VIRUSES                                          Soc. A317, 319-340.
                Crowther,R.A.(1971) Phil.Trans.Roy.Soc.B261, 221-230.

RFILTIM		Crowther,R.A. and Amos,L.A.(1971) J.Mol.Biol.60, 123-130.