TY - GEN AU - LEES,E AU - BASS,L TI - Sex hormones as a possible factor influencing the level of parasitization in frogs SN - 0028-0836 PY - 1998///1101 KW - Animals KW - Anura KW - parasitology KW - Gonadal Steroid Hormones KW - Helminths N1 - Publication Type: Journal Article UR - https://doi.org/10.1038/1881207a0 ER -