Bohlander, Dorothy Gammel. <br/><br/>
H.P.N. Gammel :  Texas bookman 
by Dorothy Gammel Bohlander and Francis Tarlton McCallum. 
 - Waco, Texas :  Texian Press,  c1985. 
 - vii, 138 p., [16] p. of plates :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 133-135. 
<br/><br/><label>ISBN: </label>0872440699 
<br/><br/><label>LCCN: </label>84052525 
<br/><br/><label>Subjects--Personal Names: </label><br/>Gammel, Hans Peter Mareus Neilsen, 1854-1931. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Booksellers and bookselling--Texas.