A new manual of logarithms to seven places of decimals / 
edited by Dr. Bruhns. 
 - Revised ed. 
 - Chicago, IL :  Charles T. Powner,  c1941. 
 - xxiii, 610 p. ;  25 cm. 
<br/><br/><label>LCCN: </label>41022762 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logarithms.
<br/><br/><label>LC Class. No.: </label>QA55  / .B92 1941