Metro Books. 2001. Kisor, Henry. Zephyr: Tracking a Dream Across America. Holbrook, Massachusetts: Adams Publishing. 1994. ISBN 1-55850-477-X. Zimmermann
Metro Books. 2001. Kisor, Henry. Zephyr: Tracking a Dream Across America. Holbrook, Massachusetts: Adams Publishing. 1994. ISBN 1-55850-477-X. Zimmermann