Home > IHR Issue Archive IHR Issue Archive All previous editions of the IHR are available in the IHR Repository. ii IHR Repository Volume 26 / Nov. 2021 Volume 25 / Jun. 2021 Volume 24 / Nov. 2020 Volume 23 / May. 2020 Volume 22 / Nov. 2019 Volume 21 / May. 2019 Volume 20 / Nov. 2018 Volume 19 / May. 2018 Volume 18 / Nov. 2017 Load more