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  1. OPT COMMUN

    ISSNs: 0030-4018

    Elsevier

    Journal

  2. OPT ENG

    ISSNs: 0091-3286

    SPIE

    Journal

  3. OPT EXPRESS

    ISSNs: 1094-4087

    The Optical Society

    Journal

  4. OPT FIBER TECHNOL

    ISSNs: 1068-5200

    Academic Press Inc.

    Journal

  5. OPTICA

    ISSNs: 2334-2536

    OSA Publishing

    Journal

  6. OPTIK

    ISSNs: 0030-4026

    Urban und Fischer Verlag Jena

    Journal

  7. OPTIM CONTR APPL MET

    ISSNs: 0143-2087

    John Wiley and Sons Ltd

    Journal

  8. OPTIM ENG

    ISSNs: 1389-4420

    Springer Netherlands

    Journal

  9. OPTIMIZATION

    ISSNs: 0233-1934

    Taylor and Francis Ltd.

    Journal

  10. OPTIM LETT

    ISSNs: 1862-4472

    Springer

    Journal

  11. OPTIM METHOD SOFTW

    ISSNs: 1055-6788

    Taylor and Francis Ltd.

    Journal

  12. OPT LASER ENG

    ISSNs: 0143-8166

    Elsevier Limited

    Journal

  13. OPT LASER TECHNOL

    ISSNs: 0030-3992

    Elsevier Limited

    Journal

  14. OPT LETT

    ISSNs: 0146-9592

    The Optical Society

    Journal

  15. OPT MATER

    ISSNs: 0925-3467

    Elsevier

    Journal

  16. OPT MATER EXPRESS

    ISSNs: 2159-3930

    The Optical Society

    Journal

  17. OPTOELECTRON ADV MAT

    ISSNs: 1842-6573

    National Institute of Optoelectronics

    Journal

  18. OPTO-ELECTRON REV

    ISSNs: 1230-3402

    Walter de Gruyter GmbH

    Journal

  19. OPTOMETRY VISION SCI

    ISSNs: 1040-5488

    Electronic ISSN : 1538-9235

    Lippincott Williams and Wilkins

    Journal

  20. OPT QUANT ELECTRON

    ISSNs: 0306-8919

    Springer New York

    Journal

  21. OPT REV

    ISSNs: 1340-6000

    Springer-Verlag GmbH and Co. KG

    Journal

  22. OPT SPECTROSC+

    ISSNs: 0030-400X

    Springer Science + Business Media

    Journal

  23. OPT SWITCH NETW

    ISSNs: 1573-4277

    Elsevier

    Journal

  24. ORAL DIS

    ISSNs: 1354-523X

    Wiley-Blackwell

    Journal

  25. ORAL HLTH PREV DENT

    ISSNs: 1602-1622

    Quintessence Publishing Company

    Indexed in DOAJ

    Journal

  26. ORAL MAXILLOFAC SURG

    ISSNs: 1865-1550

    Electronic ISSN : 1865-1569

    Springer, Germany

    Journal

  27. ORAL MAXIL SURG CLIN

    ISSNs: 1042-3699

    Electronic ISSN : 1558-1365

    W.B. Saunders Ltd

    Journal

  28. ORAL ONCOL

    ISSNs: 1368-8375

    Elsevier Limited

    Journal

  29. Oralprophylaxe & Kinderzahnheilkunde

    ISSNs: 1614-2217

    Deutscher Arzte-Verlag GmbH

    Journal

  30. ORAL RADIOL

    ISSNs: 0911-6028

    Springer Japan

    Journal

  31. ORAL SURG ORAL MED O

    ISSNs: 1079-2104

    Electronic ISSN : 1528-395X

    Mosby Inc., Germany

    Journal

  32. ORBIT-ABINGDON

    ISSNs: 0167-6830

    Electronic ISSN : 1744-5108

    informa healthcare

    Journal

  33. ORDER

    ISSNs: 0167-8094

    Springer Netherlands

    Journal

  34. ORE GEOL REV

    ISSNs: 0169-1368

    Elsevier BV

    Journal

  35. ORGAN BEHAV HUM DEC

    ISSNs: 0749-5978

    Academic Press Inc.

    Journal

  36. ORGAN DYN

    ISSNs: 0090-2616

    Elsevier BV

    Journal

  37. ORGAN ENVIRON

    ISSNs: 1086-0266

    SAGE Publications

    Journal

  38. Organisationsberatung, Supervision, Coaching

    ISSNs: 1618-808X

    Electronic ISSN : 1862-2577

    Springer

    Journal

  39. ORGANIZATION

    ISSNs: 1350-5084

    SAGE Publications

    Journal

  40. ORGANOGENESIS

    ISSNs: 1547-6278

    LANDES BIOSCIENCE

    Journal

  41. ORGANOMETALLICS

    ISSNs: 0276-7333

    American Chemical Society

    Journal

  42. ORGAN PSYCHOL REV

    ISSNs: 2041-3866

    SAGE Publications

    Journal

  43. ORGAN RES METHODS

    ISSNs: 1094-4281

    SAGE Publications

    Journal

  44. ORGAN SCI

    ISSNs: 1047-7039

    INFORMS Inst.for Operations Res.and the Management Sciences

    Journal

  45. ORGAN STUD

    ISSNs: 0170-8406

    SAGE Publications

    Journal

  46. ORG CHEM FRONT

    ISSNs: 2052-4129

    Royal Society of Chemistry

    Journal

  47. ORG DIVERS EVOL

    ISSNs: 1439-6092

    Springer

    Journal

  48. ORG ELECTRON

    ISSNs: 1566-1199

    Elsevier

    Journal

  49. ORG GEOCHEM

    ISSNs: 0146-6380

    Elsevier Limited

    Journal

  50. ORG LETT

    ISSNs: 1523-7060

    Electronic ISSN : 1523-7052

    American Chemical Society

    Journal