Lardner, D., & O'Hegarty, P. S. (1828). A discourse on the advantages of natural philosohy and astronomy, as part of a general and professional education: Being an introductory lecture delivered in the University of London, on the 28th October, 1828. printed for John Taylor.

Lardner, Dionysius, and P. S. O'Hegarty. A Discourse on the Advantages of Natural Philosohy and Astronomy, as Part of a General and Professional Education: Being an Introductory Lecture Delivered in the University of London, on the 28th October, 1828. printed for John Taylor, 1828.