Source | The Ottawa photographic zenith telescope; and Method and formulae used in P.Z.T. plate measurement; and A program machine for automatic operation of the Ottawa P.Z.T.; by Thomson, M M; Tanner, R W;
Hollinsworth, V E; Publications of the Dominion Observatory, Ottawa vol. 15, no. 4, 1955 p. 351-354, https://doi.org/10.4095/314494 Open Access |