The fifth-seventh annual report of the Board of Directors of the Zoological Society of Philadelphia :
The fifth-seventh annual report of the Board of Directors of the Zoological Society of Philadelphia :
(Incorporated March 21st, 1859). Read at the annual meeting of the members and loan-holders of the Society, April 25th, 1929
- Philadelphia : Allen, Lane & Scott, 1929
- 48 p. : ill. ; 25 cm