RT Journal Article SR Electronic T1 SELECTION FOR AND AGAINST GREGARIOUSNESS IN THE CHOICE OF OVIPOSITION SITES BY DROSOPHILA PSEUDOOBSCURA JF Genetics JO Genetics FD Genetics Society of America SP 275 OP 282 VO 58 IS 2 A1 Del Solar, Eduardo YR 1968 UL http://www.genetics.org/content/58/2/275.abstract AB