Molecular genetics of chromosome 21 and down syndrome :  proceedings of the Sixth Annual National Down Syndrome Society Symposium, held in New York, N.Y., December 7-8, 1989 / 
editors : David Patterson, Charles J. Epstein. 
 - New York :  Wiley-Liss,  1990. 
 - 294 p. :  ill. ;  23 cm. 
 - Progress in clinical and biological research ;  360 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Down's syndrome--Genetic aspects--Congresses.<br/>Down's syndrome--Molecular aspects--Congresses.<br/>Human chromosome 21--Congresses.