Piaggio, H.T.H. <br/><br/>
<An> elementary treatise on differential equations and their applications / 
H.T.H. Piaggio 
 - London :  G.Bell and sons, LTD ,  1962 
 - 257 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.
<br/><br/><label>Subjects--Index Terms: </label>Phương trình vi phân Toán học 
<br/><br/><label>Dewey Class. No.: </label>515  / PIA 1962