perfect number of the second kind

acceptance zone bromell constant delay discriminator DC automatic recording fluxmeter differential size frequency curve Japanese apricot lethrinus genivittatus lootah mine mirza ghasemi monophotogrammetry over-written Phlebotomus longipalpis phthalate buffer sozoiodolate tachycardia Ti-n-Toumma Trojan SMS under flying seal vesicosigmoidostomy