Ulrich, Laurel.
A midwife’s tale: the life of Martha Ballard, based on her diary, 1785-1812 /
Laurel Thatcher Ulrich 
. - New York : Vintage Books,  1990 
. - x, 444 p.  map.  20 cm. 
<br/>К.: Бібліогр. : c. 364-411, Index 
<br/><label>  ISBN: </label>0-679-73376-0 
<br/><br/><label>Subjects--Personal Names: </label><br/>Ballard, Martha 1735-1812