Franzen, Hartwig <br/><br/>
Exercises in gas analysis /  
Hartwing Frazen, traslated from the first german edition by Thomas Callan 
 - London :   Blackie and son limited,   1913. 
 - vii, 120 p. :   il.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>GAS<br/>METODDO DE HEMPEL
<br/><br/><label>Universal Decimal Class. No.: </label>661.91