The unseen essential :  a story for our troubled times / 
James P. Gills and HeartLight 
 - U.S.A. :  St Luke's Cataract and Intraocular Lens Institute,  c1990. 
 - 228 p. ;  21 cm. 
<br/><br/><label>LC Class. No.: </label>PS3557.I53  / U5 1990