why do some research articles not have issue number?

Question

How can I get the information for issue number for this article?

I am trying to cite this article https://www.sciencedirect.com/science/article/pii/S004060901300117X?via%3Dihub

doi: https://doi.org/10.1016/j.tsf.2013.01.016

this is what I got from doi2bib.org:

@article{Taylor2013,
  doi = {10.1016/j.tsf.2013.01.016},
  url = {https://doi.org/10.1016/j.tsf.2013.01.016},
  year = {2013},
  month = mar,
  publisher = {Elsevier {BV}},
  volume = {531},
  pages = {354--361},
  author = {A.A. Taylor and M.J. Cordill and L. Bowles and J. Schalko and G. Dehm},
  title = {An elevated temperature study of a Ti adhesion layer on polyimide},
  journal = {Thin Solid Films}
}