Australia
| Country: | Australia |
| Type: | Postage stamps |
| Series: | Scientific Development |
| Nominal: | 11 c |
| Year: | 1975 |
| Material: | KP5D paper - chalk coated with Helecon |
| Size: | 38 x 26 mm |
| Perforation: | comb 13¼ x 13¾ |
| Mintage: | 14,887,500 |
Scientific Development
 Atomic Absorption |  Radio Astronomy |  Immunology |  Oceanography |