.
Index Ap
Apastron
Apeiron (journal)
Aphelia brizula
Aphelia cyperoides
Aphelia drummondii
Aphelia gracilis
Aphelia nutans
Aphelia pumilio
Aphelion
Aphodius coniugatus
Aphodius putridus
Aplastodiscus albosignatus
Aplastodiscus cochranae
Aplastodiscus leucopygius
Aplastodiscus perviridis
apoapsis
* Apollonius of Perga
Apollonius (crater)
Appert, Nicholas-François
Applied biophysics: a molecular approach for physical scientists, Tom A. Waigh
Applied Chemistry : Theory And Practice, O. P. Vermani
Applied geophysics, Principles of , D. S. Parasnis
Applied Physics (journal)
Applied Physics Letters
Applied Spectroscopy Reviews
Approximating Irrational Numbers (V)
APS (Advanced Photon Source )
Aptenia Cordifolia 'Variegata'