Chandler, S. C. <br/><br/>
The science observer code, explanation of the number code  pt.1-3 
S. C. Chandler and J. Ritchie                                                
 - Boston  Scientific Society  1888 
 - 17p. 
 - Occasional publication; no. 1 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Observer Codes<br/>Observing Techniques
<br/><br/><label>Universal Decimal Class. No.: </label>521.97  / CHA