1. Parker, W., and Slätis, H., Sample and Window Technique: Alpha-, Beta-, and Gamma-ray Spectroscopy, edit. by Siegbahn, K. (North-Holland Pub. Co., Amsterdam, 1963; in the press).
2. Parker, W., and Falk, R., Nucl. Instr. and Meth., 16, 355 (1962).
3. Parker, W., et al. (in preparation).
4. Parker, W., Nucl. Instr. and Meth., 5, 142 (1959).
5. Morrison, G. H., and Freiser, H., Solvent Extraction in Analytical Chemistry (John Wiley and Sons, Inc., Philadelphia, 1957).