@BOOK{ Book!D - 92850191,
AUTHOR = "/ Peter C.Gega",
TITLE = "Science in elementary education",
LIBRARY= "كتابخانه مركزی و مركز اسناد دانشگاه مازندران",
SUBJECT = "Science-Study and teaching (Elementary)",
URL = "/book/92850191/Science-in-elementary-education/"}