00961nam a2200289 i 450099100114439970753620020507111850.0970308s1963 us ||| | eng b10179835-39ule_instLE00642883ExLDip.to Fisicaita52.9.5752.9.58522.2QB135Wood Bradshaw, Frank462027Photoelectric astronomy for amateurs /F.B. WoodNew York :MacMillan Co.,1963223 p. :ill. ;25 cm.Astronomical photometryVariable stars.b1017983521-09-0627-06-02991001144399707536LE006 52.9.57+52.9.58 WOO12006000029261le006-E0.00-l- 00000.i1022064127-06-02Photoelectric astronomy for amateurs189028UNISALENTOle00601-01-97ma -engus 01