@article{weko_24522_1,
   author	 = "早川,基 and 向井,利典",
   title	 = "The Planet-B neutral gas mass spectrometer",
   journal	 = "Earth, Planets and Space",
   year 	 = "1998",
   volume	 = "50",
   number	 = "9",
   pages	 = "785--792"
}