Smith, C.F. and Medina Gaud, S. 1974. THE ALATE VIVIPARAE OF PICTURAPHIS BLANCHARD (HOMOPTERA: APHIDIDAE)>. The Journal of Agriculture of the University of Puerto Rico. 58, 3 (Jul. 1974), 381–383. DOI:https://doi.org/10.46429/jaupr.v58i3.10673.