Unitary-group approach to the theory of nuclear magnetic resonance of higher-spin nuclei. II

NMR spectra of $A_3$ systems with nuclei of spin-1 are treated two different ways. One is the unitary-group approach (UGA), the other is the more conventional spin-product-basis method. This is done to illustrate the efficiency of UGA compared to other methods and to clarify some ambiguities in a recent publication of ours on the subject. An extension of UGA to the case of more than three particles of spin higher than 1 is straightforward.