Rogers, Francis M. <br/><br/>
Precision astrolabe :  Portuguese navigators and transoceanic aviation / 
F.M. Rogers. 
 - Lisboa :  Acad. internacional de cultura Portuguesa,  1971. 
 - XXXI, 397 p. :  ill., map. ;  23 cm. 
<br/><br/>Bibl. pp. 369-376 Index pp. 377-397 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrolabe