
Source: On lifting restrictions that you have placed in your own mind in order to achieve your goals in “Dan Hartman Manages to Turn a Career Valley into Peak” https://news.google.com/newspapers?nid=943&dat=19890307&id=gGkLAAAAIBAJ&sjid=OlMDAAAAIBAJ&pg=6768,567004&hl=en in Mohave Daily Miner (1989 Mar 7)