Technical appraisal of the 70mm format for map reproduction 

 - Hertfordshire  Hertfordshire Country Council Technical Library Service    1968 
 - 44p  cm. 
<br/><br/><label>Standard No.: </label>4,987 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEOGRAPHY
<br/><br/><label>Dewey Class. No.: </label>U11, K8