1. Spherical Trigonometry;Donnay,1945
2. Textbook of Pollen Analysis;Faegri,1964
3. The description of the pollen of the species of the family Chenopodiaceae growing in the territory of the U.S.S.R.;Monoszon;Tr. Inst. Geogr., Akad. Nauk S.S.S.R.,1952
4. A preliminary study of the genus Chenopodium in North America;Wahl;Bartonia,1954
5. Pollen Grains. Their Structure, Identification and Significance in Science and Medicine;Wodehouse,1935