Analysis of drugs and metabolites by gas chromatography-mass spectrometry, Vol. 7, Natural, pyrolytic, and metabolic products of tabacco and marijuana : by B.J. Gudzinowicz and M.J. Gudzinowicz, Marcel Dekker, New York, 1980, 576 pp., price SFr. 146.00, ISBN 0-8247-6861-2.