@book {Beard1894, title = {A Practical Treatise on Nervous Exhaustion (Neurasthenia): Its Symptoms, Nature, Sequence, Treatment}, year = {1894}, publisher = {Treat}, organization = {Treat}, address = { New York}, author = {Beard, George} } @book {Beard1881, title = {American Nervousness, its Causes and Consequences: A Supplement to Nervous Exhaustion (Neurasthenia)}, year = {1881}, publisher = {Putnam}, organization = {Putnam}, address = { New York}, author = {Beard, George} }