Sweden 1772-1775a booklet

Sweden 1772-1775a booklet of 2 each, MNH, $11.00. Michel 1572-1575 MH 145. Nobel laureates in Physiology, 1989. Genetics: Thomas Morgan, Fruit flies; James Watson, Francis Crick, Maurice Wilkins - molecular structure of DNA; Werner Arber, Daniel Nathans, Hamilton Smith - gene hybrids; Barbara NcClintock, botanist.