"Biological signals" to "biological signals and receptors", S.F. Pang et al; hypothalamic relationships between interleukin-6 and LHRH release affected by bacterial endotoxin in adult male rats, C. Feleder et al; circadian rhythms in adenohypophysial hormone levels and hypothalamic monoamine turnover in mycobacterial-adjuvant-injected rats, L. Selgas et al; acute and chronic effects of superior cervical ganglionectomy on in vitro mitogenic responses of lymphocytes from submaxillary lymph nodes of pituitary-grafted rats, P.O. Castrillon et al; cytokine-neurotransmitter interactions in the brain, M.G. De Simoni and L. Imeri; cytokines and cognitive function in mice, M. Bianchi et al; mechanism of action of interleukin-1 in modulating gonadotropin secretion - in vivo and in vitro studies, D. Dondi et al; melatonin involvement in immunity and cancer, F. Fraschini et al.