The formerly secret-restricted data 'Capabilities of Nuclear Weapons', DNA-EM-1 is being published online
Preliminary pages (45 in all): including cover, frontispiece, change 1 pages list (1 July 1978 updates, making it more recent than Glasstone and Dolan 1977), change 2 pages list (1 August 1981 updates), letter of authorization from the Deputy Director of the Defense Nuclear Agency, Foreword by Lt. General C. H. Dunn (Director of the Pentagon's Defense Nuclear Agency, Washington, D.C.), and a complete contents list of chapters, sections, illustrations, and tables.
Chapter 8: PHENOMENA AFFECTING ELECTROMAGNETIC PROPAGATION (94 pages). This chapter is the physics for high altitude nuclear explosion phenomena such as fireball rise, expansion and settlement, predictions of debris transfer across the magnetic equator to conjugate regions, and so on; far more detailed and useful than the simplistic treatment in the unclassified version The Effects of Nuclear Weapons by Glasstone and Dolan, 1977.
The information from this blog post has now been used to revise and consolidate the earlier post, Samuel Glasstone and Philip J. Dolan, linked here.