Judul asli : "Elementaire Bedriffseconomic"
No Inv.: 12157/P/Perp/98/1c
Bibliografi di tiap babNo Inv.: 11268-11268A/P/Perp/98/2c~3820/P/Perp/99/1c
No Inv.: 10614-10623/P/Perp/97/10c
Faint Objects and How to Observe Them is for visual observers who are equipped with a 10-inch or larger astronomical telescope and who want to "go deep" with their observing. It provides a guide to some of the most distant, dim, and rarely observed objects in the sky, supported by background information on surveys and objects lists - some familiar, such as Caldwell, and some not so familiar. Th…
No Inv.: 138332-138334/P/Perp/14/3c~141501,141502/P/Perp/14/2c
No Inv.: 2987/P/Perp/98/1c~128219-128220/PH/Perp/10/2c
No Inv.: 793-794/S/Perp/98/2c
Judul asli : "Coping with Abortion"