De Morgan, A., Joly, J. R., & Society for the Diffusion of Useful Knowledge. (1836). 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. Baldwin and Cradock.

De Morgan, Augustus, et al. 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. Baldwin and Cradock, 1836.