More cards in this set

Card 6

Front

Zuckerman (1979)

Back

Preview of the front of card 6

Card 7

Front

Breen and Zimmermann (2001)

Back

Preview of the front of card 7

Card 8

Front

Thorgeirsson et al (2008)

Back

Preview of the front of card 8

Card 9

Front

Gartner et al (2009)

Back

Preview of the front of card 9