TY - ECHAP AU - Douglas Gough AU - A. Kosovichev CY - Dordrecht DO - 10.1007/978-94-009-0541-2_27 M1 - Astrophysics and Space Science Library PB - Springer Netherlands PP - Dordrecht PY - 1990 SN - 978-94-010-6730-0/0067-0057 SP - 327 EP - 340 TI - Using Helioseismic Data to Probe the Hydrogen Abundance in the Solar Core VL - 159 ER -