This "O-C" graph used the data of "OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES" of AAVSO.
Reference :
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 1, AAVSO Eclipsing Binary Committee
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 2, AAVSO Eclipsing Binary Committee
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 3, AAVSO Eclipsing Binary Committee
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 4, AAVSO Eclipsing Binary Committee
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 5, AAVSO Eclipsing Binary Committee
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 6, AAVSO Eclipsing Binary Committee
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 7, AAVSO Eclipsing Binary Committee
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 8, AAVSO Eclipsing Binary Committee
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 9, AAVSO Eclipsing Binary Committee
OBSERVED MINIMA TIMINGS OF ECLIPSING BINARIES, NUMBER 10, AAVSO Eclipsing Binary Committee
Link : AAVSO Eclipsing Binary Times of Minimum
ANDAB
ANDAD
ANDBD
ANDBX
ANDDS
ANDRT
ANDTW
ANDUU
ANDWZ
ANDXZ
AQLKO
AQLKP
AQLOO
AQLV342
AQLV343
AQLV346
AQLV1315
AQLXZ
AQRCX
AQRCZ
AQRRY
ARIRX
ARISS
AURAP
AURAR
AURCL
AUREP
AURHP
AURRY
AURSX
AURTT
AURWW
BOOAD
BOOTU
BOOTY
BOOTZ
BOOUW
BOOVW
BOOZZ
CAMAL
CAMSV
CAMY
CAPRW
CAPTY
CASAB
CASCW
CASDZ
CASIR
CASIS
CASIV
CASMM
CASOR
CASOX
CASPV
CASRZ
CASTV
CASTW
CASV364
CASV375
CASV380
CEPDK
CEPDL
CEPDV
CEPEG
CEPEK
CEPSU
CEPU
CEPVW
CEPWZ
CEPXX
CEPZZ
CETSS
CETTW
CMAR
CMART
CMASX
CMATU
CMAUU
CMIAK
CMIXZ
CMIYY
COMCC
COMRW
COMRZ
COMSS
CRBRW
CRBU
CRTV
CRVRV
CRVW
CYGAE
CYGBR
CYGCG
CYGDK
CYGKR
CYGKV
CYGMY
CYGSW
CYGV346
CYGV387
CYGV388
CYGV401
CYGV456
CYGV466
CYGV477
CYGV548
CYGV704
CYGWW
CYGY
CYGZZ
DELFZ
DELTT
DELTY
DELW
DELYY
DRAAI
DRABH
DRAEX
DRARZ
DRATW
DRAUZ
DRAZ
EQUS
ERITZ
ERIYY
FRIAT
FRIBO
FRIEP
FRIMX
FRIRU
FRIRW
GEMAF
GEMAL
GEMRW
GEMSX
GEMTX
GEMU
GEMWW
HERCC
HERCT
HERRX
HERSZ
HERTT
HERTU
HERUX
HYAAV
HYADF
HYADI
HYADK
HYAWY
LACAR
LACAW
LACCM
LACCO
LACDG
LACSW
LACVX
LEOUU
LEOUV
LEOVZ
LEOY
LEPRR
LEPZ
LIBDELTA
LIBSS
LMIT
LYNRY
LYRBETA
LYREW
LYRFL
LYRUZ
MONAT
MONBB
MONBO
MONEP
MONMX
MONRU
MONRW
OPHSX
OPHU
OPHV508
OPHV839
OPHV1010
OPHV1034
ORIEF
ORIEQ
ORIER
ORIET
ORIFL
ORIFT
ORIGU
PEGBB
PEGBX
PEGDI
PEGGP
PEGIP
PEGTY
PEGU
PEGUX
PERBETA
PERBX
PERKW
PERRT
PERRV
PERST
PERXZ
PERZ
PHEAE
PSCRV
PSCY
PUPAV
PUPUZ
SATAT
SATBO
SATEP
SATMX
SATRU
SATRW
SERAO
SERCC
SERRS
SGEU
SGRV505
SGRV1968
SUNAT
SUNBO
SUNEP
SUNMX
SUNRU
SUNRW
TAUAC
TAUAM
TAUCT
TAUEQ
TAUHU
TAURW
TAURZ
TAUTY
TAUWY
THUAT
THUBO
THUEP
THUMX
THURU
THURW
TRIRS
TRIRV
TRIV
TRIX
TUEAT
TUEBO
TUEEP
TUEMX
TUERU
TUERW
UMAAF
UMATX
UMATY
UMAUX
UMAVV
UMAW
UMAXZ
UMAZZ
UMIRU
UMIW
VIRAG
VIRAH
VIRAK
VIRAW
VIRAZ
VIRBH
VIRVV
VULAW
VULAX
VULAY
VULBE
VULBO
VULBS
VULBT
VULBU
VULCD
VULZ
WEDAT
WEDBO
WEDEP
WEDMX
WEDRU
WEDRW