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L
1.
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Call structure and apecies groups in U.S Blair, W Frank
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L
2.
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Genetic compatibility and species groups in U.S Blair, W Frank
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L
3.
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Genetic compatibility in the Bufo valliceps and closely related groups of toads Blair, W Frank
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L
4.
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Two family-groups of neotropical frogs Burger, W Leslie
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L
5.
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Sketch of the primary groups of the Batrachia Cope, Edward Drinker
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L
6.
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The adaptive ecology of the species groups of the genus Leptodactylus (Amphibia, Leptodactylidae) Heyer, W Ronald
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L
7.
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Parotoid gland secretions in two species groups of toads (genus Bufo) Wittlíff, J L
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L
8.
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Longevity and age-size groups in some common snakes Fitch, Henry S
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L
9.
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Osteology of North American Bufo: the americanos, cognatus, and boreas species groups Martin, Robert F
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L
10.
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Histocompatibility groups in the Mexican axolotl DeLanney, Louis E
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