Welti, D. <br/><br/>
Infrared vapour spectra :  group frequency correlations, sample handling and the examination of gas chromatographic fractions / 
by D. Welti. 
 - London :  Heyden,  1970 
 - 211 p. ;  26 cm. 
<br/><br/><label>ISBN: </label>0855010193 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Infrared spectroscopy.