See the LŠSS archives for almanacs with lectures from the LŠSS, starting with the 9th (1965) and ending with the 60th annual LŠSS (2016).
The almanacs have been digitalized. For capacity reasons, the website only includes two almanacs: one from one of the early summer schools and the newest one.
You can find the list of lectures from the Summer School of Slavonic Studies No. 9-59 here. We can send you a specific digitalized almanac upon request.
In 2018, selected lectures were added to the almanac of the International Symposium on Czech as a Foreign Language.