Richard S. Dunn; Mary Maples Dunn; Marianne S. Wokeck; Joy Wiltenburg; Alison Duncan Hirsch MT - 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 MT - 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.