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A Projection handbook / compiled by James A. Hilliard, Ümit Basoglu, Phillip C. Muehrcke.

An explanation of the gnomonic projection of the sphere : and of such points of astronomy as are most necessary in the use of astronomical maps: being a description of the construction and use of the larger and smaller maps of the stars; as also of the six maps of the earth / By August De Morgan ...

An explanation of the gnomonic projection of the sphere; and of such points of astronomy as are most necessary in the use of astronomical maps: being a description of the construction and use of the larger and smaller maps of the stars; as also of the six maps of the earth. By August De Morgan ...