Johnson, Anne <br/><br/>
A student's guide to the ferns of Singapore Island / 
Anne Johnson 
 - 2nd ed. 
 - Singapore :  Singapore University Press,  1977 
 - xii ,126 p. :  ill. ;  25 cm. 
<br/><br/> Originally published in The Malayan Nature  Journal, Vol. 13, Nos. 3 and 4, July 1959 
<br/><br/>Includes indexes