The bio written by Hoffmeister has been digitized by the National Library of the Czech Republic. Unfortunately, it's only in Czech. But for those who can understand it, I suppose it is one of the most comprehensive work on Klička and his music:
https://kramerius5.nkp.cz/view/uuid:0c2c7220-3287-11e3-a5bb-005056827e52?page=uuid:1e9a0f80-6bc1-11e3-af76-5ef3fc9ae867
https://kramerius5.nkp.cz/view/uuid:0c2c7220-3287-11e3-a5bb-005056827e52?page=uuid:1e9a0f80-6bc1-11e3-af76-5ef3fc9ae867