TY - JOUR AU - J Ortigoso AU - I Kleiner AU - Jon Hougen C2 - Journal of Chemical Physics DA - 1999-06-01 LA - en M1 - 110 PB - Journal of Chemical Physics PY - 1999 TI - The K-Rotational Labeling Problem for Eigenvectors From Internal Rotor Calculations: Application to Energy Levels of Acetaldehyde Below the Barrier ER -