1. Johnson G. E., Decker W. A., Forney A. J. and Field J. H., Carbon Blacks Produced from Coal, manuscript in preparation.
2. Ergun S., to be published.
3. Ergun S., Bayer J. and Van Buren W., J. Appl. Phys., to be published.
4. X-Ray Diffraction in Random Layer Lattices
5. An X‐Ray Study of Carbon Black