[THE EXTINE STRUCTURE OF RAGWEED POLLEN].
D000485:Allergens; D052179:Antigens, Plant; D004583:Electrons; D006653:Histology; D008853:Microscopy; D008854:Microscopy, Electron; D010936:Plant Extracts; D011058:Pollen; D006255:Rhinitis, Allergic, Seasonal
D000485:Allergens; D052179:Antigens, Plant; D010936:Plant Extracts; C433085:ragweed pollen
HAY FEVER; HISTOLOGY; MICROSCOPY, ELECTRON; POLLEN