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Fig. 1.

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Continuum-subtracted Hα images of the galaxies NGC 4262 (first row, left), 4429 (first row, right), 4459 (second row, left), 4469 (second row, right), 4476 (third row, left), 4477 (third row, right), 4526 (last row, left), and 4552 (last row, right). As in all the following figures, north is up, and east is to the left.

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