5 books • 3 series
Suesswasserflora Von Mitteleuro
Neukaledonien (Bibliotheca Diatomologica, #32)
Brachysira- Monographie Der Gattung (Bibliotheca Diatomologica, #29)
85 New Taxa and Much More Than 100 Taxonomic Clarifications Supplementary to Suesswasserflora Von Mitteleuropa, Pts. 1-4 (Eighty-Five New Taxa & Much More Than One Hundred Taxonomic)
Achnanthes (Bibliotheca Diatomologica, #18)