A private treatise addressed to youth, manhood and old age on the diseases of the nervous and sexual system, showing these formidable disorders to be curable in all their stagesVan Graef Medical CompanyEnglishBook1888New York : Van Graef Medical Co., 1888.Sexual disorders—TreatmentImpotence—TreatmentSexually transmitted diseases—TreatmentPatent medicinesAdvertising—DrugsBook