LIBRARY  CATALOGUE  SLIPS. 
[Mount  each  slip  upon  a  separate  card,  placing  the  subject  at  the  top  of  the 
second  slip.  The  name  of  the  series  should  not  be  repeated  on  the  series 
card,  but  the  additional  numbers  should  be  added,  as  received,  to  the  first 
entry.] 
U.  S.     Geological  survey. 
.  .  .  Contributions  to  economic  geology,  1903.  S.  F. 
Emmons  [and]  C.  W.  Hayes,  geologists  in  charge. 
Washington,  Gov't  print,  off.,  1904. 
527,  III  p.     illus.,  1  pi.  (map).     23icm.      (Bulletin  no.  225.) 
Subject  series  A,  Economic  geology,  33. 
Contains  contributions  by  various  members  of  the  survey.  A  list  of  pre- 
vious publications  by  the  survey  on  each  subject  is  given. 
U.  S.     Geological  survey. 
.  .  .  Contributions  to  economic  geology,  1903.  S.  F. 
Emmons  [and]  C.  W.  Hayes,  geologists  in  charge. 
Washington,  Gov't  print,  off.,  1904. 
527,  III  p.     illus.,  1  pi.  (map).     23£c'\     (Bulletin  no.  225.) 
Subject  series  A,  Economic  geology,  33. 
Contains  contributions  by  various  members  of  the  survey.  A  list  of  pre- 
vious publications  by  the  survey  on  each  subject  is  given. 
U.  S.     Geological  survey. 
Bulletins, 
no.  225.  Contributions  to  economic  geology,  1903.     1904. 
<•         U.S.     Dept.  of  the  Interior. 
I  see  also 
1     U.  S.     Geological  survey. 
