@BOOK{ Book!D - 91677362,
AUTHOR = "PERLIN,I E",
TITLE = "Trigonometry",
LIBRARY= "کتابخانه مرکزی دانشگاه صنعتی امیرکبیر",
SUBJECT = " TRIGONOMETRY,PLANE  ",
URL = "/book/91677362/Trigonometry/"}