Boom times were on, unemployment was low, in order to went to college and got a degree you were assured for this good paying job and career long run. Some in the available units are known as nicotine replacement therapy.
Fish hoki, tuna, and mackerel are method sources. https://www.youtube.com/playlist?list=PLQSnJhLvLzmugEQ_ebjijzKB5lbacPep4