Koning, Catherine Owen. — Wading right in: discovering the nature of wetlands / Catherine Owen Koning and Sharon M. Ashworth ; with illustrations by Catherine Owen Koning. — 1 online resource (ix, 266 pages) : illustrations. — In English. — Доступ по паролю из сети Интернет (чтение, печать, копирование). — <URL:https://elib.spbstu.ru/ebsco/pdf/1941211.pdf>. — <URL:https://elib.spbstu.ru/ebsco/epub/1941211.epub>. — Текст: электронный
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