This looks like her birthhttps://familysearch.org/pal:/MM9.1.1/FBT2-P2DStrabane is a Registration District of Donegal.You can order a research Cert here https://www.welfare.ie/en/Pages/Apply-for-Certificates.aspxDon't worry about parts of the form you can't fill in, just be sure to give the Name, Quarter, District, Vol and Page Number.Get a Research CertAnd include your Email to receive it that way.It costs €4.Once you have her mothers name, you can find the parents marriage and so on.It's best to work back step by step, that way you don't spend an age following the wrong family.