Читать книгу Danny Dunn and the Fossil Cave - Jay Williams - Страница 5
ОглавлениеACKNOWLEDGMENTS
The authors wish to express their thanks to John Atwood—Director of Research, Perkin-Elmer Corporation—for technical advice and information, and to Rose Wyler of Science Materials Center, for information concerning the Geiger-Müller Counter.