many birch pollen on stone and surface of puddle in spring season - birch and alder pollen is natural source of seasonal pollen allergy (oral allergy syndrome)
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MLA Citation: many birch pollen on stone and surface of puddle in spring season - birch and alder pollen is natural source of seasonal pollen allergy (oral allergy syndrome). Stock Photo. iPHOTOS.com, Authentic Creatives, LLC, 01-06-2016, https://iphotos.com/download.php?iid=1250295&tl=photos. Accessed 29-05-2024.