TY - RPRT TI - TRUNCATED REACTION OPERATORS AND THE HELIUM PROBLEM AU - Goscinski, S. O. AU - Hirschfelder, J. O. AU - Meath, W. J. AU - Sando, K. M. PY - 1963 UR - https://ntrs.nasa.gov/citations/19630004189 ID - 19630004189 ER -