  Non-monotonic features of rotation curves, and also the related gravitational
effects typical of thin disks -- like backward-reaction or amplification of
rotation by negative surface density gradients -- which are characteristic
imprints of disk-like mass distributions, are discussed in the axisymmetric
thin disk model. The influence of the data cutoff in rotational velocity
measurements on the determination of the mass distribution in flattened
galaxies is studied.
  It has also been found that the baryonic matter distribution in the spiral
galaxy NGC 5475, obtained in the axisymmetric thin disk approximation, accounts
for the rotation curve of the galaxy. To obtain these results, the iteration
method developed recently by the authors has been applied.
