Шаблон:Merck11th
The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals (11th изд.). Merck Publishing. 1989. ISBN 091191028X.
Документација шаблона[направи]
The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals (11th изд.). Merck Publishing. 1989. ISBN 091191028X.