Weight and histological studies of growth and regression in the bursa of Fabricius in the mallard, Anas platyrhynchos.

@article{Ward1971WeightAH,
  title={Weight and histological studies of growth and regression in the bursa of Fabricius in the mallard, Anas platyrhynchos.},
  author={James A. Ward and Anne Middleton},
  journal={Canadian journal of zoology},
  year={1971},
  volume={49 1},
  pages={11-4}
}

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