Errata to (10.21), (10.22), (10.23) and (10.24)

missing ^ on the excitation and de-excitation operators

Errata to (10.10), (10.11), (10.12) and (10.13)

missing ^ on some of the excitation and de-excitation operators

Errata to (11.84), (11.85), (11.86), (11.87), (11.89), (11.90), (11.93), (11.94)

missing ^ on some of the excitation and/or de-excitation operators

Errata to (11.48) and (11.54)

missing ^ on some of the excitation or de-excitation operators

Errata to (9.101), (9.102) and (9.104)

missing ^ on some of the excitation or de-excitation operators

Erratum to (10.29)

hbar was missing in front of the frequency

Erratum to (12.25)

^ missing on one of the operators