Metabolite sensitivity in the methaqualone radioimmunoassay.

Recent literature reflects the increased use of RIA as a qualitative and quantitative tool. This study exemplifies the problems that may arise when this technique is used for quantitation. Caution must be exercised, and a physiological and toxicological understanding of each particular drug is essential to provide credible results. It is evident that the sensitivity and ease of the RIA method for methaqualone makes it invaluable as a screening test, but confirmation and quantitation of this drug must remain with those methods that can quantitate each metabolite.     

Book reviews

David Granick, Enterprise Guidance in Eastern Europe. A Comparison of Four Socialist Economies. Princeton, N.J.: Princeton UP, 1976. xvi+505 pp. £17.20 or £6.10 (paperback).

A. Zauberman, Mathematical Theory in Soviet Planning (Concepts, Methods, Techniques). London: OUP for the Royal Institute of International Affairs, 1976. xiv+464 pp. £17.00.

H. Gordon Skilling, Czechoslovakia's Interrupted Revolution. Princeton, N.J.: Princeton UP, 1976. 924 pp. £31.30 or £10.50 (paperback).

Alex Pravda, Reform and Change in the Czechoslovak Political System: January‐August 1968. Sage Research Papers in the Social Sciences, vol. 3, series No. 90–020 (Contemporary European Studies Series). Beverly Hills and London: Sage Publications, 1976. 96 pp. £1.30.

R. G. Gidadhubli (ed.), Fifty Years of Soviet Power—a Study of Social, Economic and Political Developments. Centre of Soviet Studies, University of Bombay, 1976. 295 pp. 29 rupees.

Occasional Papers, Centre for Soviet and East European Studies, Jawalharlal Nehru University, New Delhi, Nos. 2 and 3, 1976 (mimeographed).

Adam B. Ulam, A History of Soviet Russia. London: Martin Robertson, 1976. viii+312 pp. £5.00.

Olga A. Narkiewicz, The Green Flag: Polish Populist Politics 1867–1970. London: Croom Helm, 1976. 314 pp. £7.95.

Jacques Levesque, L'URSS et la révolution cubaine. Montreal: Presses de 1'Université de Montréal, 1976. 221 pp.

John B. Dunlop, The New Russian Revolutionaries. Belmont, Mass.: Nordland, 1976. 344 pp. $18.50.

Brian Hunter, Soviet‐ Yugoslav relations 1948–1972: a bibliography of Soviet, Western and Yugoslav comment and analysis. New York and London: Garland, 1976. 223 pp. $20.00.     

Excepted substances: a comparison of Federal and state laws.

A state law has placed an obligation on the criminal investigation laboratories to screen and quantitate all preparations, both pharmaceutical and illicit, that fall under the provisions of "Excepted Substances." Without complete screens on these preparations, there is room for erroneous indictments as well as possible acquittals on technicalities.