==Biology==* Dogfish sharks (Squalidae), a family of sharks** Spiny dogfish (tualus acrchias), best known species of dogfish sharks* Catshark (Scyliorhinidae), a family of ground sharks including ...
Foreword / Eugenie Clark -- Preface -- Acknowledgments -- Introduction -- How to use this book -- Description of species accounts -- Illustrations -- Glossary -- Bibliography -- Knowledge and study of ...
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