Pehr Hjalmar Olsson-Seffer

1873 – 1911

• Genesis and development of sand formations on marine coasts
• Report on Hidalgo plantations and impressions of La Zacualpa rubber plantation
• Rubber planting in Mexico and Central America
• Rubber planting in Mexico and Central America
• Genesis and development of sand formations on marine coasts ; The sand strand flora of marine coasts
• La agricultura en varios países tropicales y subtropicales
• Relation of soil and vegetation on sandy sea shores
• The place of Linnaeus in the history of botany
• Three Papers
• Vestaustralien handbok ...