Richard S. Dunn; Mary Maples Dunn; Marianne S. Wokeck; Joy Wiltenburg; Alison Duncan Hirsch; Craig W. Horle University of Pennsylvania Press (1987) Kovakantinen kirja
Richard S. Dunn; Mary Maples Dunn; Craig W. Horle; Alison Duncan Hirsch; Marianne S. Wokeck; Joy Wiltenburg University of Pennsylvania Press (1987) Kovakantinen kirja
Richard S. Dunn; Mary Maples Dunn; Scott M. Wilds; Richard Alan Ryerson; Jean R. Soderlund; Ned C. Landsman University of Pennsylvania Press (1982) Kovakantinen kirja
The Gateway to Science Workbook with Labs provides expansion activities for each lesson in the student text. Reading comprehension, writing, and listening/speaking skills are reinforced with additional communicative activities and critical thinking exercises. Labs and experiments support key concepts.