How did comic book artists draw and publish during th 50's and 60's. Especially Robert Crumb.?

He began drawing and by 1959 had published Fritz the Cat. I was wondering how he went about a step by step process (not to to in depth) but a general way of how he drew and published his artwork. According to stephen k, he used pens and radiographs to draw because he did not like using the computer (other than for straight printing). So how did he go about drawing comic books? If you know how artists drew back in the 60's (without the use of a computer) then please inform me of a general process of what they would do. Or any links to information that could aid me. My assignment is due by tomorrow night. Thanks for any and all help!