NASA technical translation TT (series). F-491. Theory of motion of Planet Pluto: pt. 2, Plutonian perturbations of 2d order with respect to perturbing masses; pt. 3, Recalculation of 1st-order Plutonian perturbations with respect to perturbing masses; pt. 4. New elements of Pluto [with list of references]; by Sh. G. Sharaf and N. A. Budnikova.

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