English: Cover of How to Enter Vaudeville by Frederic La Delle (Frederick Clifford Kirkpatrick). Copyrighted 1913 Frederic La Delle Co., Jackson, Michigan. Published by Excelsior Printing Company, 1913. Library of Congress serial number appears to be CLA343401. Tagline: "A complete illustrated course of instruction"
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{{Information | description = {{en|Cover of ''How to Enter Vaudeville'' by Frederic La Delle (Frederick Clifford Kirkpatrick). Copyrighted 1913 Frederic La Delle Co., Jackson, Michigan. Published by Excelsior Printing Company, 1913