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1.
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New observations concerning the maps of presumtive areas of the young amphibian gastrula (Amblystoma and Discodossus) Pasteels, Sean J
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2.
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The opercular apparatus of salamanders Monath, Thomas
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3.
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A study of induced metamorphosis in the axolotl Prahlad, Kadaba V - DeLanney, LE
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4.
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The regulation of urea-biosynthesis enzymes in vertebrates Mora, J - Martuscelli, J - Ortiz-Pineda, Juana - Soberon, G
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5.
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Determination in the cranial neura crest of the axolotl Newth, David R
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6.
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Further studies on the origin of amphibian pigment cells Niu, MC
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7.
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A revised check-list of the chromosome number in Vertebrata Oguma, Kan - Kakino, Sajiro
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8.
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A contribution to the internal structure of the amphibian brain Osborn, Henry Fairfield
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9.
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Morphological elements of the skull Parker, William Kitchen
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10.
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Observations sur la fécondation des urodeles Robin, Charles Philippe
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