Access: key to the source literature of the chemical sciences 

 - Colombus :   Chemical abstracts service,   1969. 
 -  28 cm. 
<br/><br/> Título de cubierta.    Reemplaza: list to periodicals abstracts, 1908-1960 y CA-List of periodicals, 1961-1967 
<br/><br/><label>Subjects--Topical Terms: </label><br/>QUIMICA-BIBLIOGRAFIA
<br/><br/><label>Universal Decimal Class. No.: </label>016:54(05)