Quantitative mass spectrometry in life sciences II : proceedings of the second international symposium held at the State University of Ghent, June 13-16, 1978 - Leenheer, A. P. de; Peteghem, C. van, 1946-; Roncucci, R. R. (Romeo R.) (Elsevier Scientific Pub. Co. ; distributors for the United States and Canada, Elsevier North-Holland, 1978)