The UK and US surveys of developers that Simon and I did, I think

Is this it?
https://zenodo.org/record/2585783

@software{olivier_philippe_2019_2585783,
  author       = {Olivier Philippe and
                  Martin Hammitzsch and
                  Stephan Janosch and
                  Anelda van der Walt and
                  Ben van Werkhoven and
                  Simon Hettrick and
                  Daniel S. Katz and
                  Katrin Leinweber and
                  Sandra Gesing and
                  Stephan Druskat and
                  Scott Henwood and
                  Nicholas R. May and
                  Nooriyah P. Lohani and
                  Manodeep Sinha},
  title        = {{softwaresaved/international-survey: Public release 
                   for 2018 results}},
  month        = mar,
  year         = 2019,
  publisher    = {Zenodo},
  version      = {2018-v.1.0.2},
  doi          = {10.5281/zenodo.2585783},
  url          = {https://doi.org/10.5281/zenodo.2585783}
}

No, I was thinking of the UK blog/data:

• @Hettrick-blog - S. Hettrick, “It's impossible to conduct research without software, say 7 out of 10 UK researchers,” Software Sustainaiblity Institute, 2014. Available at: https://www.software.ac.uk/blog/2016-09-12-its-impossible-conduct-research-without-software-say-7-out-10-uk-researchers
• @hettrick2014 - S.J. Hettrick, M. Antonioletti, L. Carr, N. Chue Hong, S. Crouch, D. De Roure, et al, “UK Research Software Survey 2014”, Zenodo, 2014. http://doi.org/10.5281/zenodo.14809

and the US paper/data:

• @nangia_katz_2017 - U. Nangia and D. S. Katz, “Track 1 Paper: Surveying the U.S. National Postdoctoral Association Regarding Software Use and Training in Research,” WSSSPE5.1, 2017. http://doi.org/10.6084/m9.figshare.5328442.v1
• [not yet in the references] Udit Nangia, & Daniel S. Katz. (2017). Survey of National Postdoctoral Association - Dataset [Data set]. Zenodo. http://doi.org/10.5281/zenodo.843607

Also, the ref you just added as olivier_philippe_2019_2585783 was already there as @rse-survey