1926 | Diphyllobothrium species, |
1927 | Herbarium Image: Elodea sp. |
1928 | Rhizophydium |
1929 | Melosira, |
1930 | Herbarium Image: Myosotis scorpioides |
1931 | Ceraclea dissimilis larva, |
1932 | Pleurotaenium, |
1933 | Herbarium Image: Rorippa islandica |
1934 | Gyrosigma, |
1935 | Progress Report June 1989 |
1936 | Syngenta Pond Physchem Data (2003) |
1937 | Heptagenia fuscogrisea |
1938 | Peridinium, |
1939 | Prymnesium |
1940 | Gomphosphaeria, |
1941 | Porphyridium, |
1942 | Uroglena volvox |
1943 | Herbarium Image: Mimulus luteus |
1944 | Herbarium Image: Nitella opaca |
1945 | Herbarium Image: Nitella opaca |
1946 | Herbarium Image: Potamogeton perfoliatus |
1947 | Herbarium Image: Oenanthe fluviatilis |
1948 | Nostoc, |
1949 | Herbarium Image: Potamogeton crispus |
1950 | Trentepohlia, |