Progressus rei botanicae =
Fortschritte der Botanik = Progrès de la botanique = Progress of botany.

APA Citation

Lotsy, J. Paulus., Association internationale des botanistes. (19071917). Progressus rei botanicae =: Fortschritte der Botanik = Progrès de la botanique = Progress of botany. Jena: G. Fischer.

MLA Citation

Lotsy, Johannes Paulus, 1867-1931, and Association internationale des botanistes. Progressus Rei Botanicae =: Fortschritte Der Botanik = Progrès De La Botanique = Progress of Botany. Jena: G. Fischer, 19071917.

Warning: These citations may not always be complete (especially for serials).