animals beginner belonging belonging(socialpsychology) classification comics control digenea diseasevectors dwellings etc fairies fiction freshwatermussels freshwatersnails friendship gastropoda general graphicnovels handbooks identification insects juvenilefiction kidnapping latinamerica loneliness manuals mollusca mollusks parasites parasiticdiseases parasitology poetry qx675m245s1985 rabbits racing readers repairing rescue rescues schistosoma schistosomiasis sharing slugs(mollusks) snailsascarriersofdisease socialthemes spanishlanguagematerials spiders transmission trematoda trematodeinfections tropics